Subtract 63/50 from 21/63, Solve 21/63

Subtract 63/50 from 21/63

1^st number: 21/63, 2^nd number: 1 13/50

21/63 - 63/50 is -139/150.

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

Next, find the equivalent fraction of both fractional numbers with denominator 3150
For the 1st fraction, since 63 × 50 = 3150,
21/63 = 21 × 50/63 × 50 = 1050/3150
Likewise, for the 2nd fraction, since 50 × 63 = 3150,
63/50 = 63 × 63/50 × 63 = 3969/3150
Subtract the two like fractions:
1050/3150 - 3969/3150 = 1050 - 3969/3150 = -2919/3150
After reducing the fraction, the answer is -139/150

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