Question

With her promotion, Nicki's salary increased from $19.50 an hour to $22.50 an hour. What is the percent of increase, rounded to the nearest whole number?
A. 9%
B. 15%
C. 18%
D. 22%

Answer 1

It would be B because the acctual percentage is %15.38

Answer 2

The equation for percentage increase is
{(New value - old value) / old value} x100%
Therefore it should be
{(22.5 - 19.5) / 19.5} x 100%
=15% (rounded to nearest whole number)
Answer is B