Question 805572
what is 7/20-1/25
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It's an arithmetic problem.
Find a common denominator, then subtract.
The product always works, 20*25 = 500
7/20-1/25
= 175/500 - 20/500
= 155/500
= 31/100
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Don't waste time fretting about the LEAST common denominator.
Its only contribution is to waste time.