Subtract 12/42 from 50/40, Solve 1 10/40

Subtract 12/42 from 50/40

1^st number: 1 10/40, 2^nd number: 12/42

50/40 - 12/42 is 27/28.

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

Next, find the equivalent fraction of both fractional numbers with denominator 840
For the 1st fraction, since 40 × 21 = 840,
50/40 = 50 × 21/40 × 21 = 1050/840
Likewise, for the 2nd fraction, since 42 × 20 = 840,
12/42 = 12 × 20/42 × 20 = 240/840
Subtract the two like fractions:
1050/840 - 240/840 = 1050 - 240/840 = 810/840
After reducing the fraction, the answer is 27/28

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