1987 AMC 8 Problem 2

Attempt Problem 2 of the 1987 AMC 8 below, then check your answer against the professionally curated solution from LIVE by Po-Shen Loh. You can also try the full timed exam, view all 1987 AMC 8 solutions, or check the answer key.

All problems are used with official legal permission of the Mathematical Association of America (MAA).

2.

What is 225\dfrac{2}{25} written as a decimal?
0.0080.008
0.080.08
0.80.8
1.251.25
12.512.5
Answer: B
Concepts:fractiondecimal
Small hint:
Rewrite the fraction with a denominator of 100100
Big hint:
Multiply the numerator and denominator by 44
Solution:
Multiplying top and bottom by 44 gives 225=8100=0.08.\dfrac{2}{25} = \dfrac{8}{100} = 0.08.
Thus, the correct answer is B .
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