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If 40% of a number is less than its 60% by 30, then the 20% of that number is:
Answer & Solution
Correct Answer:
Option
D
$$\eqalign{
& {\text{Let the number be }}x \cr
& \frac{{x \times 40}}{{100}} = \frac{{x \times 60}}{{100}} - 30 \cr
& 40x = 60x - 3000 \cr
& 20x = 3000 \cr
& x = 150 \cr
& \frac{{x \times 20}}{{100}} = \frac{{150 \times 20}}{{100}} = 30 \cr} $$
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