Question

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

• A. 5% of a
• B. 30% of a
• C. 4% of a
• D. 20% of a

Answer 1

Answer:

C. 4% of a

20% of a=b $\Rightarrow$ $a \times (20 / 100) = b$ b% of 20 = x% of a $\Rightarrow 20 \times (b/100) = a \times x/100$

$20 \times (1/100)$ = $5 \times (x/100) $⇒ $x = 20/5 $= 4%