Subtract 20/50 from 7/84, Solve 7/84

Subtract 20/50 from 7/84

7/84 - 20/50 is -19/60.

Find the least common denominator or LCM of the two denominators:
LCM of 84 and 50 is 2100

Next, find the equivalent fraction of both fractional numbers with denominator 2100
For the 1st fraction, since 84 × 25 = 2100,
7/84 = 7 × 25/84 × 25 = 175/2100
Likewise, for the 2nd fraction, since 50 × 42 = 2100,
20/50 = 20 × 42/50 × 42 = 840/2100
Subtract the two like fractions:
175/2100 - 840/2100 = 175 - 840/2100 = -665/2100
After reducing the fraction, the answer is -19/60

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