Subtract 50/30 from 70/49, Solve 1 21/49

Subtract 50/30 from 70/49

1^st number: 1 21/49, 2^nd number: 1 20/30

70/49 - 50/30 is -5/21.

Find the least common denominator or LCM of the two denominators:
LCM of 49 and 30 is 1470

Next, find the equivalent fraction of both fractional numbers with denominator 1470
For the 1st fraction, since 49 × 30 = 1470,
70/49 = 70 × 30/49 × 30 = 2100/1470
Likewise, for the 2nd fraction, since 30 × 49 = 1470,
50/30 = 50 × 49/30 × 49 = 2450/1470
Subtract the two like fractions:
2100/1470 - 2450/1470 = 2100 - 2450/1470 = -350/1470
After reducing the fraction, the answer is -5/21

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