Subtract 70/63 from 6/40, Solve 6/40

Subtract 70/63 from 6/40

1^st number: 6/40, 2^nd number: 1 7/63

6/40 - 70/63 is -173/180.

Find the least common denominator or LCM of the two denominators:
LCM of 40 and 63 is 2520

Next, find the equivalent fraction of both fractional numbers with denominator 2520
For the 1st fraction, since 40 × 63 = 2520,
6/40 = 6 × 63/40 × 63 = 378/2520
Likewise, for the 2nd fraction, since 63 × 40 = 2520,
70/63 = 70 × 40/63 × 40 = 2800/2520
Subtract the two like fractions:
378/2520 - 2800/2520 = 378 - 2800/2520 = -2422/2520
After reducing the fraction, the answer is -173/180

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