Subtract 70/63 from 42/50, Solve 42/50

Subtract 70/63 from 42/50

1^st number: 42/50, 2^nd number: 1 7/63

42/50 - 70/63 is -61/225.

Find the least common denominator or LCM of the two denominators:
LCM of 50 and 63 is 3150

Next, find the equivalent fraction of both fractional numbers with denominator 3150
For the 1st fraction, since 50 × 63 = 3150,
42/50 = 42 × 63/50 × 63 = 2646/3150
Likewise, for the 2nd fraction, since 63 × 50 = 3150,
70/63 = 70 × 50/63 × 50 = 3500/3150
Subtract the two like fractions:
2646/3150 - 3500/3150 = 2646 - 3500/3150 = -854/3150
After reducing the fraction, the answer is -61/225

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