Subtract 15/21 from 42/2
1st number: 21 0/2, 2nd number: 15/21
42/2 - 15/21 is 142/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 2 × 21 = 42,
42/2 = 42 × 21/2 × 21 = 882/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
15/21 = 15 × 2/21 × 2 = 30/42 - Subtract the two like fractions:
882/42 - 30/42 = 882 - 30/42 = 852/42 - After reducing the fraction, the answer is 142/7
- In mixed form: 202/7
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