the price of a book is increased from $ 300 to $ 450 . what is the % of increase in its price ?
"explanation : change in the price = rs 450 â € “ rs 300 = rs 150 percentage of increase = change in the price initial price * 100 . percentage increase in price = ( 150 300 ) * 100 = 50 % d"
multiply(divide(subtract(450, 300), 300), const_100)