Subtract 15/30 from 21/50
21/50 - 15/30 is -2/25.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 30 is 150
Next, find the equivalent fraction of both fractional numbers with denominator 150 - For the 1st fraction, since 50 × 3 = 150,
21/50 = 21 × 3/50 × 3 = 63/150 - Likewise, for the 2nd fraction, since 30 × 5 = 150,
15/30 = 15 × 5/30 × 5 = 75/150 - Subtract the two like fractions:
63/150 - 75/150 = 63 - 75/150 = -12/150 - After reducing the fraction, the answer is -2/25
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