Subtract 12/20 from 80/42
1st number: 1 38/42, 2nd number: 12/20
80/42 - 12/20 is 137/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 42 × 10 = 420,
80/42 = 80 × 10/42 × 10 = 800/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
12/20 = 12 × 21/20 × 21 = 252/420 - Subtract the two like fractions:
800/420 - 252/420 = 800 - 252/420 = 548/420 - After reducing the fraction, the answer is 137/105
- In mixed form: 132/105
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