Subtract 50/40 from 84/42, Solve 2 0/42

Subtract 50/40 from 84/42

1^st number: 2 0/42, 2^nd number: 1 10/40

84/42 - 50/40 is 3/4.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 40 is 840

Next, find the equivalent fraction of both fractional numbers with denominator 840
For the 1st fraction, since 42 × 20 = 840,
84/42 = 84 × 20/42 × 20 = 1680/840
Likewise, for the 2nd fraction, since 40 × 21 = 840,
50/40 = 50 × 21/40 × 21 = 1050/840
Subtract the two like fractions:
1680/840 - 1050/840 = 1680 - 1050/840 = 630/840
After reducing the fraction, the answer is 3/4

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