Subtract 21/4 from 10/75, Solve 10/75

Subtract 21/4 from 10/75

1^st number: 10/75, 2^nd number: 5 1/4

10/75 - 21/4 is -307/60.

Find the least common denominator or LCM of the two denominators:
LCM of 75 and 4 is 300

Next, find the equivalent fraction of both fractional numbers with denominator 300
For the 1st fraction, since 75 × 4 = 300,
10/75 = 10 × 4/75 × 4 = 40/300
Likewise, for the 2nd fraction, since 4 × 75 = 300,
21/4 = 21 × 75/4 × 75 = 1575/300
Subtract the two like fractions:
40/300 - 1575/300 = 40 - 1575/300 = -1535/300
After reducing the fraction, the answer is -307/60

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