Subtract 49/42 from 2/40, Solve 2/40

Subtract 49/42 from 2/40

1^st number: 2/40, 2^nd number: 1 7/42

2/40 - 49/42 is -67/60.

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,
2/40 = 2 × 21/40 × 21 = 42/840
Likewise, for the 2nd fraction, since 42 × 20 = 840,
49/42 = 49 × 20/42 × 20 = 980/840
Subtract the two like fractions:
42/840 - 980/840 = 42 - 980/840 = -938/840
After reducing the fraction, the answer is -67/60

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