Please explain to me how to do this...

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

you need to find out how much (%) the savings increased.  To do this, first find the difference (the amount of increase).  $377.60-$320= 57.60.  Then you need to find the percent it increased from original.  To do this, it's a percent, so: divide increase by original amount and multiply by 100. (57.60/320) x 100 = 18% increase.  Hope this helps!

Answer 2

First, calculate the difference between the amount saved this month and the amount saved last month:

 

$377.60 - $320 = $57.60

 

Now, divide $57.60 by $320 to determine the percent increase:

 

$57.60/$320 = 0.18

 

.18 is 18 percent (e.g. 0.18 x 100% = 18%)

 

Thus, Cathy experienced an 18% increase in the amount of money she saved this month versus last month.