Subtract 42/10 from 2/28, Solve 2/28

Subtract 42/10 from 2/28

1^st number: 2/28, 2^nd number: 4 2/10

2/28 - 42/10 is -289/70.

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,
2/28 = 2 × 5/28 × 5 = 10/140
Likewise, for the 2nd fraction, since 10 × 14 = 140,
42/10 = 42 × 14/10 × 14 = 588/140
Subtract the two like fractions:
10/140 - 588/140 = 10 - 588/140 = -578/140
After reducing the fraction, the answer is -289/70

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