Subtract 21/10 from 6/28, Solve 6/28

Subtract 21/10 from 6/28

1^st number: 6/28, 2^nd number: 2 1/10

6/28 - 21/10 is -66/35.

Find the least common denominator or LCM of the two denominators:
LCM of 28 and 10 is 140

Next, find the equivalent fraction of both fractional numbers with denominator 140
For the 1st fraction, since 28 × 5 = 140,
6/28 = 6 × 5/28 × 5 = 30/140
Likewise, for the 2nd fraction, since 10 × 14 = 140,
21/10 = 21 × 14/10 × 14 = 294/140
Subtract the two like fractions:
30/140 - 294/140 = 30 - 294/140 = -264/140
After reducing the fraction, the answer is -66/35

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