Question

find the percentage of 5:7:8​

Answer 1

let % be 5x 7x and 8x

5x+7x+8x=100

20x=100

x=100/20

=>x=5

Thus percentage are

5x=25%

7x=35%

8x=40%

Answer 2

let the percent of 5:7:8 be 5x , 7x and 8x
According to the question
5x +7x +8x = 100
20x = 100
X = 100/20
=> X = 5
5x = (5×5)% = 25%
7x = (7×5)% = 35%
8x = (8×5)% = 40%