Subtract 48/42 from 21/10, Solve 2 1/10

Subtract 48/42 from 21/10

1^st number: 2 1/10, 2^nd number: 1 6/42

21/10 - 48/42 is 67/70.

Find the least common denominator or LCM of the two denominators:
LCM of 10 and 42 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 10 × 21 = 210,
21/10 = 21 × 21/10 × 21 = 441/210
Likewise, for the 2nd fraction, since 42 × 5 = 210,
48/42 = 48 × 5/42 × 5 = 240/210
Subtract the two like fractions:
441/210 - 240/210 = 441 - 240/210 = 201/210
After reducing the fraction, the answer is 67/70

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