Question

Charmaine penny bank is 3/10 full. After she adds 560 pennies it is 4/5 full. How many pennies can charmaine bank hold?

Answer 1

Given Data:

The fraction of penny bank originally full was 3/10.

The fraction of penny bank which was full after 560 pennies were added was 4/5.

The fraction of penny bank which was filled by 560 pennies can be determined as,

`\begin{gathered} (4)/(5)-(3)/(10)=(8-3)/(10) \\ =(5)/(10) \\ =(1)/(2) \end{gathered}`

1/2 is eqivalent to 560 pennies, Full penny bank is equivalent to,

`\begin{gathered} (560)/((1)/(2))=560*2 \\ =1120 \end{gathered}`

Thus, penny bank can hold 1120 pennies.