Subtract 9/10 from 10/28, Solve 10/28

Subtract 9/10 from 10/28

10/28 - 9/10 is -19/35.

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,
10/28 = 10 × 5/28 × 5 = 50/140
Likewise, for the 2nd fraction, since 10 × 14 = 140,
9/10 = 9 × 14/10 × 14 = 126/140
Subtract the two like fractions:
50/140 - 126/140 = 50 - 126/140 = -76/140
After reducing the fraction, the answer is -19/35

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