Subtract 25/10 from 70/42, Solve 1 28/42

Subtract 25/10 from 70/42

1^st number: 1 28/42, 2^nd number: 2 5/10

70/42 - 25/10 is -5/6.

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

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 42 × 5 = 210,
70/42 = 70 × 5/42 × 5 = 350/210
Likewise, for the 2nd fraction, since 10 × 21 = 210,
25/10 = 25 × 21/10 × 21 = 525/210
Subtract the two like fractions:
350/210 - 525/210 = 350 - 525/210 = -175/210
After reducing the fraction, the answer is -5/6

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