Subtract 12/7 from 25/20, Solve 1 5/20

Subtract 12/7 from 25/20

1^st number: 1 5/20, 2^nd number: 1 5/7

25/20 - 12/7 is -13/28.

Find the least common denominator or LCM of the two denominators:
LCM of 20 and 7 is 140

Next, find the equivalent fraction of both fractional numbers with denominator 140
For the 1st fraction, since 20 × 7 = 140,
25/20 = 25 × 7/20 × 7 = 175/140
Likewise, for the 2nd fraction, since 7 × 20 = 140,
12/7 = 12 × 20/7 × 20 = 240/140
Subtract the two like fractions:
175/140 - 240/140 = 175 - 240/140 = -65/140
After reducing the fraction, the answer is -13/28

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