Subtract 50/20 from 12/84, Solve 12/84

Subtract 50/20 from 12/84

1^st number: 12/84, 2^nd number: 2 10/20

12/84 - 50/20 is -33/14.

Find the least common denominator or LCM of the two denominators:
LCM of 84 and 20 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 84 × 5 = 420,
12/84 = 12 × 5/84 × 5 = 60/420
Likewise, for the 2nd fraction, since 20 × 21 = 420,
50/20 = 50 × 21/20 × 21 = 1050/420
Subtract the two like fractions:
60/420 - 1050/420 = 60 - 1050/420 = -990/420
After reducing the fraction, the answer is -33/14

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