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

2 Answers

7 votes

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


User Mujahid Bhoraniya
by
7.7k points
2 votes

2/5 = 8/n

Cross multiply:

2 *n = 5 *8

2n = 40

Divide both sides by 2:

n = 40 / 2

n = 20

User Nrussell
by
8.1k points

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