Subtract 7/21 from 49/10, Solve 4 9/10

Subtract 7/21 from 49/10

1^st number: 4 9/10, 2^nd number: 7/21

49/10 - 7/21 is 137/30.

Find the least common denominator or LCM of the two denominators:
LCM of 10 and 21 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 10 × 21 = 210,
49/10 = 49 × 21/10 × 21 = 1029/210
Likewise, for the 2nd fraction, since 21 × 10 = 210,
7/21 = 7 × 10/21 × 10 = 70/210
Subtract the two like fractions:
1029/210 - 70/210 = 1029 - 70/210 = 959/210
After reducing the fraction, the answer is 137/30
In mixed form: 417/30

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