What is 120 books increased by 55%?

1 Answer
May 23, 2016

186

Explanation:

When you write 55% you are basically writing a shortened version of #55/100#

So the amount of increase is #55/100# of #120#. The mathematical equivalent of the word 'of' is multiply

So increase is:#" "color(brown)(55%" of "120)color(blue)(" "->" "55/100xx120 = 66)#

So the new total is #120+66=186#