Subtract 48/42 from 6/40, Solve 6/40

Subtract 48/42 from 6/40

1^st number: 6/40, 2^nd number: 1 6/42

6/40 - 48/42 is -139/140.

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,
6/40 = 6 × 21/40 × 21 = 126/840
Likewise, for the 2nd fraction, since 42 × 20 = 840,
48/42 = 48 × 20/42 × 20 = 960/840
Subtract the two like fractions:
126/840 - 960/840 = 126 - 960/840 = -834/840
After reducing the fraction, the answer is -139/140

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