A piggy bank has some coins in it. There are 400% more pennies than quarters. If there are 90 coins in the bank, how many quarters are there?

pennies-than-quarter

#1

A piggy bank has some coins in it. There are 400% more pennies than quarters. If there are 90 coins in the bank, how many quarters are there?

Answer:

90=q+p
400/100=4
P=4q
90=q+4q
90=5q
90/5=5/5
18=q

Assuming that there are only pennies and quarters:
90=P+Q
4Q=P
90=4Q+Q
90=5Q (Divide both sides by 5)
18=Q
There are 18 quarters in the bank