Subtract 21/15 from 42/30
1st number: 1 12/30, 2nd number: 1 6/15
42/30 - 21/15 is 0/1.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 15 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 30 × 1 = 30,
42/30 = 42 × 1/30 × 1 = 42/30 - Likewise, for the 2nd fraction, since 15 × 2 = 30,
21/15 = 21 × 2/15 × 2 = 42/30 - Subtract the two like fractions:
42/30 - 42/30 = 42 - 42/30 = 0/30 - The answer is 0
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