Subtract 49/42 from 2/10, Solve 2/10

Subtract 49/42 from 2/10

1^st number: 2/10, 2^nd number: 1 7/42

2/10 - 49/42 is -29/30.

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,
2/10 = 2 × 21/10 × 21 = 42/210
Likewise, for the 2nd fraction, since 42 × 5 = 210,
49/42 = 49 × 5/42 × 5 = 245/210
Subtract the two like fractions:
42/210 - 245/210 = 42 - 245/210 = -203/210
After reducing the fraction, the answer is -29/30

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