If 20% of a = b, then b% of 20 is the same as:

20% of a

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200% of a

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4% of a

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2% of a

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None of These

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Solution

The correct option is C
4% of a

20% of a = b

⇒ $\frac{20}{100}$ $\times$ a =b

b% of 20 = $\frac{b}{100}$ $\times$ 20

= $\frac{20 a}{100}$ $\times$ $\frac{1}{100}$ $\times$ 20

= $\frac{4 a}{100}$

= 4% of a

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If 20% of a = b, then b% of 20 is the same as:

The correct option is C 4% of a 20% of a = b ⇒ 20100×a =b b% of 20 = b100×20 = 20a100 × 1100 × 20 = 4a100 = 4% of a

The correct option is C
4% of a

20% of a = b

⇒ $\frac{20}{100}$ $\times$ a =b

b% of 20 = $\frac{b}{100}$ $\times$ 20

= $\frac{20 a}{100}$ $\times$ $\frac{1}{100}$ $\times$ 20

= $\frac{4 a}{100}$

= 4% of a