Question

2/5 = 8/n how do I solve it

Answer 1

n = 20

One way is to use the method of ' cross multiplication '

`(a)/(b)` =
`(c)/(d)` ⇒ ad = bc

Hence 2n = 8 × 5 = 40

divide both sides by 2

n =
`(40)/(2)` = 20

Answer 2

2/5 = 8/n

Cross multiply:

2 *n = 5 *8

2n = 40

Divide both sides by 2:

n = 40 / 2

n = 20