Subtract 15/6 from 21/30
1st number: 21/30, 2nd number: 2 3/6
21/30 - 15/6 is -9/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 6 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 30 × 1 = 30,
21/30 = 21 × 1/30 × 1 = 21/30 - Likewise, for the 2nd fraction, since 6 × 5 = 30,
15/6 = 15 × 5/6 × 5 = 75/30 - Subtract the two like fractions:
21/30 - 75/30 = 21 - 75/30 = -54/30 - After reducing the fraction, the answer is -9/5
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