Subtract 21/25 from 30/60
30/60 - 21/25 is -17/50.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 25 is 300
Next, find the equivalent fraction of both fractional numbers with denominator 300 - For the 1st fraction, since 60 × 5 = 300,
30/60 = 30 × 5/60 × 5 = 150/300 - Likewise, for the 2nd fraction, since 25 × 12 = 300,
21/25 = 21 × 12/25 × 12 = 252/300 - Subtract the two like fractions:
150/300 - 252/300 = 150 - 252/300 = -102/300 - After reducing the fraction, the answer is -17/50
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