The amount in a savings account increased from $200 to $210. What was the percent of the increase?
So percentage increase is
You can see that in terms of money the increase was
Expressed as a fraction of the original deposit
Percent means 'for each 100'
So we need to change the 200 into 100.
For multiply and divide what you do to the bottom you do to the top
Divide top and bottom by 2 giving:
So the increase is 5%