**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