Subtract 21/28 from 30/75
30/75 - 21/28 is -7/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 28 is 2100
Next, find the equivalent fraction of both fractional numbers with denominator 2100 - For the 1st fraction, since 75 × 28 = 2100,
30/75 = 30 × 28/75 × 28 = 840/2100 - Likewise, for the 2nd fraction, since 28 × 75 = 2100,
21/28 = 21 × 75/28 × 75 = 1575/2100 - Subtract the two like fractions:
840/2100 - 1575/2100 = 840 - 1575/2100 = -735/2100 - After reducing the fraction, the answer is -7/20
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