Subtract 21/54 from 15/75
15/75 - 21/54 is -17/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 54 is 1350
Next, find the equivalent fraction of both fractional numbers with denominator 1350 - For the 1st fraction, since 75 × 18 = 1350,
15/75 = 15 × 18/75 × 18 = 270/1350 - Likewise, for the 2nd fraction, since 54 × 25 = 1350,
21/54 = 21 × 25/54 × 25 = 525/1350 - Subtract the two like fractions:
270/1350 - 525/1350 = 270 - 525/1350 = -255/1350 - After reducing the fraction, the answer is -17/90
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