alleryA mixture has substances A, B, C and D in the ratio 5:9:4:2. What percentage is B?
A45%
B25%
C20%
D9%
Answer & Solution
Correct answer: A. 45%
1. The total is 5 + 9 + 4 + 2 = 20 parts.
2. B is 9/20, which is 45 out of 100.
3. 25% is A and 20% is C.
_Source: Wikipedia, Ratio, Proportions and percentage ratios_
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