Question

The are 90 pens in a box and 36 of them are red and the rest of them are black

1.what is the red pens to all the pens in the box
2.what is ratio of the black pens to all the pens in the box

Answer 1

1.what are the red pens compared to all the pens in the box

90-36=54

2. what is the ratio of black pens to all pens in the box

54:90 = 3:5

Explanation: