Subtract 15/45 from 21/75
21/75 - 15/45 is -4/75.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 45 is 225
Next, find the equivalent fraction of both fractional numbers with denominator 225 - For the 1st fraction, since 75 × 3 = 225,
21/75 = 21 × 3/75 × 3 = 63/225 - Likewise, for the 2nd fraction, since 45 × 5 = 225,
15/45 = 15 × 5/45 × 5 = 75/225 - Subtract the two like fractions:
63/225 - 75/225 = 63 - 75/225 = -12/225 - After reducing the fraction, the answer is -4/75
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