Question

Cathy saved $320 last month. This month, she saved $377.60. What is the percent increase for the amount of money Cathy saved?

Answer 1

At the first you should calculate the difference amount between two month:
$ 377.60-$320=$57.60
And then you divide $57.60 by $ 320
like $57.60/ $320= 0.18=18%
So 18% is the answer