Question

Charmaine's penny bank is 2/3 full. After she removes 160 pennies, it is 4/9 full. How many pennies can Charmaine's bank hold?

Answer 1

2/3 = 6/9

6/9 - 4/9 = 2/9

160÷2 = 80

80 = 1/9

80*9= 720 pennies

Answer 2

2/3X - 160 = 4/9X
2/3X - 4/9X = 160
6/9X -4/9X = 160
2/9X = 160
X =80x9
X = 720