Question

A jar contains 75 marbles. 3/5 of the marbles are black. What fraction of the marbles are black, using 75 as the denominator?

Answer 1

75/5=15
15*3=45
45/75 marbles are black.

Answer 2

`(45)/(75)` black marbles.

Explanation:

A jar contains 75 marbles.

`(3)/(5)` of the marbles are black.

We will multiply
`(3)/(5)` by 75 to get the number of black marbles.

The number of black marbles =
`(3)/(5)` × 75

=
`(3)/(1)` × 15

= 45 marbles

45 marbles are black out of 75 marbles. so we can write
`(45)/(75)` black marbles.