Mamie saved $161.25. This is 25% of the amount she needs to save. How much money does Mamie need to save?

1 Answer
Dec 2, 2016

Answer:

#$645#

Explanation:

#25%# is the same as #1/4#

If The amount that Mamie has saved is #1/4# of what she needs, then the full amount will be 4 times as much.

#$161.25 xx 4 = $645#

Or you can write a proportion:
"If $161.25 is 25%, how much is 100%?"

#25/100 = 161.25/x#

#x = 161.25 xx 100/25#

#x = $645#