Subtract 42/20 from 2/7
1st number: 2/7, 2nd number: 2 2/20
2/7 - 42/20 is -127/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 7 × 20 = 140,
2/7 = 2 × 20/7 × 20 = 40/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
42/20 = 42 × 7/20 × 7 = 294/140 - Subtract the two like fractions:
40/140 - 294/140 = 40 - 294/140 = -254/140 - After reducing the fraction, the answer is -127/70
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