Subtract 70/63 from 3/40, Solve 3/40

Subtract 70/63 from 3/40

1^st number: 3/40, 2^nd number: 1 7/63

3/40 - 70/63 is -373/360.

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,
3/40 = 3 × 63/40 × 63 = 189/2520
Likewise, for the 2nd fraction, since 63 × 40 = 2520,
70/63 = 70 × 40/63 × 40 = 2800/2520
Subtract the two like fractions:
189/2520 - 2800/2520 = 189 - 2800/2520 = -2611/2520
After reducing the fraction, the answer is -373/360

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