If 25% of A = 20% of B = 10% of C, find A : B : C.

Correct option is A

Given:
25% of A = 20% of B = 10% of C
Formula Used:
​$$\text{Percentage} = \frac{\text{Value}}{100} \times \text{Number}$$​​
Solution:
Let 25% of A = 20% of B = 10% of C = x
​$$\frac{25}{100} \times A = x \Rightarrow A = \frac{100x}{25} = 4x\\\ \\\frac{20}{100} \times B = x \Rightarrow B = \frac{100x}{20} = 5x\\\ \\\frac{10}{100} \times C = x \Rightarrow C = \frac{100x}{10} = 10x$$​​
Therefore,
A : B : C = 4x : 5x : 10x = 4 : 5 : 10