Subtract 21/10 from 10/75, Solve 10/75

Subtract 21/10 from 10/75

1^st number: 10/75, 2^nd number: 2 1/10

10/75 - 21/10 is -59/30.

Find the least common denominator or LCM of the two denominators:
LCM of 75 and 10 is 150

Next, find the equivalent fraction of both fractional numbers with denominator 150
For the 1st fraction, since 75 × 2 = 150,
10/75 = 10 × 2/75 × 2 = 20/150
Likewise, for the 2nd fraction, since 10 × 15 = 150,
21/10 = 21 × 15/10 × 15 = 315/150
Subtract the two like fractions:
20/150 - 315/150 = 20 - 315/150 = -295/150
After reducing the fraction, the answer is -59/30

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