Question

Whay is the precent of increase from 50 to 90

Answer 1

1 ) Let's solve this problem, setting a proportion

50----------- 100%

90------------- x

Cross multiplying it

50x =9000 Divide both sides by 50

x= 180

2) Since the question wants the percent of the increase, and 90 is equivalent to 180% then we can subtract:

180% -100% = 80%

3) Then the percent of increase from 50 to 90 is 80%