A number is four-fifths of the other. If their sum is 180, find the numbers.

Question

asked Jan 9, 2023 102k views

2 Answers

Ivars · Answer 1 · 2023-01-14T02:15:13+0000

Answer:

100 and 80

Explanation:

let the numbers be n and
(4)/(5) n , then their sum is

n +
(4)/(5) n = 180 ( multiply through by 5 to clear the fraction )

5n + 4n = 900 , that is

9n = 900 ( divide both sides by 9 )

n = 100

and
(4)/(5) × 100 = 4 × 20 = 80

the numbers are 100 and 80