Subtract 60/40 from 50/21, Solve 2 8/21

Subtract 60/40 from 50/21

1^st number: 2 8/21, 2^nd number: 1 20/40

50/21 - 60/40 is 37/42.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 40 is 840

Next, find the equivalent fraction of both fractional numbers with denominator 840
For the 1st fraction, since 21 × 40 = 840,
50/21 = 50 × 40/21 × 40 = 2000/840
Likewise, for the 2nd fraction, since 40 × 21 = 840,
60/40 = 60 × 21/40 × 21 = 1260/840
Subtract the two like fractions:
2000/840 - 1260/840 = 2000 - 1260/840 = 740/840
After reducing the fraction, the answer is 37/42

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