Subtract 10/4 from 20/70, Solve 20/70

Subtract 10/4 from 20/70

1^st number: 20/70, 2^nd number: 2 2/4

20/70 - 10/4 is -31/14.

Find the least common denominator or LCM of the two denominators:
LCM of 70 and 4 is 140

Next, find the equivalent fraction of both fractional numbers with denominator 140
For the 1st fraction, since 70 × 2 = 140,
20/70 = 20 × 2/70 × 2 = 40/140
Likewise, for the 2nd fraction, since 4 × 35 = 140,
10/4 = 10 × 35/4 × 35 = 350/140
Subtract the two like fractions:
40/140 - 350/140 = 40 - 350/140 = -310/140
After reducing the fraction, the answer is -31/14

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