Question

Ratio of expenses of a and b are 2:3 and that
of b and c are 5:7 find the ratio of expenses of a,b and c ?

Answer 1

a : b = 2 : 3

(Multiply by 5)

a : b = 2x5 : 3x5

a : b = 10 : 15

b : c = 5 : 7

(Multiply by 3)

b : c = 5x3 : 7x3

b : c = 15 : 21

a : b = 10 : 15

b : c = 15 : 21

a : b : c = 10 : 15 : 21

Answer: a : b : c = 10 : 15 : 21