Question

She purchased 40% of the copies in the store. She has 80 copies of the cd. How many cd were on sale

Answer 1

To find the number of CD on sale, we can set an equation.

Let y be the number if CD.

As she bought 40%, the amount she bought= 40%y

The equation:

40%y = 80

0.4y = 80

y = 80÷0.4

y=320

Therefore there were originally 320 CDs.

Hope it helps!