Subtract 1/21 from 80/42
1st number: 1 38/42, 2nd number: 1/21
80/42 - 1/21 is 13/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
80/42 = 80 × 1/42 × 1 = 80/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
1/21 = 1 × 2/21 × 2 = 2/42 - Subtract the two like fractions:
80/42 - 2/42 = 80 - 2/42 = 78/42 - After reducing the fraction, the answer is 13/7
- In mixed form: 16/7
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