Question

The ratio of black pens to blue pens in a box is 2:5. (2M) What fraction of pens are blue?

Answer 1

fraction =
`(5)/(7)`

Explanation:

given

black pens : blue pens = 2 : 5

sum the parts of the ratio , that is 2 + 5 = 7 parts

5 parts are blue

then the fraction of blue pens =
`(5)/(7)`