Subtract 21/63 from 30/50, Solve 30/50

Subtract 21/63 from 30/50

30/50 - 21/63 is 4/15.

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,
30/50 = 30 × 63/50 × 63 = 1890/3150
Likewise, for the 2nd fraction, since 63 × 50 = 3150,
21/63 = 21 × 50/63 × 50 = 1050/3150
Subtract the two like fractions:
1890/3150 - 1050/3150 = 1890 - 1050/3150 = 840/3150
After reducing the fraction, the answer is 4/15

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