We're dividing 77937128 by 99 
The aim is to understand the frequency of 99 in 77937128.

Let's proceed to step 1:
The number 99 fits into 7 0 times, leaving a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Append the next digit (7) from the dividend to 7 and continue with: 77 / 99

Advancing to step 2:
The number 99 fits into 77 0 times, leaving a remainder of 77.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 77 leaves us with 77.
Take the next digit (9) from the dividend and append it to 77, then repeat: 779 / 99

On to step 3:
If we divide 779 by 99, we get 7 and a remainder of 86.
Write down 7 as next digit of the result. 
Result so far: 7.0
If we subtract 693 from 779, we get 86.
Fetch the next digit (3) from the dividend, attach it to 86 and continue: 863 / 99

Step 4:
If we divide 863 by 99, we get 8 and a remainder of 71.
Record the quotient 8 as the next digit in the result. 
Result so far: 78.0
If we take 792 away from 863, we end up with 71.
Bring next digit (7) of the dividend behind the 71 and repeat the process: 717 / 99

Going ahead to step 5:
717 divided by 99 is 7 with a remainder of 24.
The next digit of our result is 7. 
Result so far: 787.0
If we subtract 693 from 717, we get 24.
Grab the next digit (1) from the dividend, add it to 24, then carry on: 241 / 99

Step 6:
241 divided by 99 is 2 with a remainder of 43.
The number 2 becomes the next digit in our result. 
Result so far: 7872.0
Subtracting 198 from 241 leaves us with 43.
Take the next digit (2) from the dividend and append it to 43, then repeat: 432 / 99

On to step 7:
When dividing 432 by 99, we get 4 with a remainder of 36.
Use 4 as the next digit of our solution. 
Result so far: 78724.0
Subtracting 396 from 432 leaves us with 36.
Include the next digit (8) from the dividend after 36, then repeat: 368 / 99

Let's proceed to step 8:
When dividing 368 by 99, we get 3 with a remainder of 71.
Write down 3 as next digit of the result. 
Result so far: 787243.0
Subtract 297 from 368 to get 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Going ahead to step 9:
When dividing 710 by 99, we get 7 with a remainder of 17.
Write down 7 as next digit of the result. 
Result so far: 787243.7
If we take 693 away from 710, we end up with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Going ahead to step 10:
If we divide 170 by 99, we get 1 and a remainder of 71.
Put 1 as the next digit of the answer. 
Result so far: 787243.71
Subtracting 99 from 170 leaves us with 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

On to step 11:
When dividing 710 by 99, we get 7 with a remainder of 17.
Record the quotient 7 as the next digit in the result. 
Result so far: 787243.717
If we subtract 693 from 710, we get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

On to step 12:
99 goes into 170 1 times with a remainder of 71.
Write down 1 as next digit of the result. 
Result so far: 787243.7171
If we subtract 99 from 170, we get 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

On to step 13:
710 divided by 99 is 7 with a remainder of 17.
Record the quotient 7 as the next digit in the result. 
Result so far: 787243.71717
The remainder is 17 after subtracting 693 from 710.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Moving on to step 14:
99 can be fit into 170 1 times, resulting in a remainder of 71.
Record the quotient 1 as the next digit in the result. 
Result so far: 787243.717171
If we take 99 away from 170, we end up with 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Moving on to step 15:
The number 99 fits into 710 7 times, leaving a remainder of 17.
Put 7 as the next digit of the answer. 
Result so far: 787243.7171717
The remainder is 17 after subtracting 693 from 710.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Step 16:
When dividing 170 by 99, we get 1 with a remainder of 71.
Put 1 as the next digit of the answer. 
Result so far: 787243.71717171
The remainder is 71 after subtracting 99 from 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Our division results in 787243.71717171 with a remaining 7.1e-08.