Subtract 21/30 from 7/75
7/75 - 21/30 is -91/150.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 30 is 150
Next, find the equivalent fraction of both fractional numbers with denominator 150 - For the 1st fraction, since 75 × 2 = 150,
7/75 = 7 × 2/75 × 2 = 14/150 - Likewise, for the 2nd fraction, since 30 × 5 = 150,
21/30 = 21 × 5/30 × 5 = 105/150 - Subtract the two like fractions:
14/150 - 105/150 = 14 - 105/150 = -91/150
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