Subtract 10/30 from 49/21, Solve 2 7/21

Subtract 10/30 from 49/21

1^st number: 2 7/21, 2^nd number: 10/30

49/21 - 10/30 is 2/1.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 30 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 21 × 10 = 210,
49/21 = 49 × 10/21 × 10 = 490/210
Likewise, for the 2nd fraction, since 30 × 7 = 210,
10/30 = 10 × 7/30 × 7 = 70/210
Subtract the two like fractions:
490/210 - 70/210 = 490 - 70/210 = 420/210
After reducing the fraction, the answer is 2/1

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