Subtract 27/20 from 40/70
1st number: 40/70, 2nd number: 1 7/20
40/70 - 27/20 is -109/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 70 × 2 = 140,
40/70 = 40 × 2/70 × 2 = 80/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
27/20 = 27 × 7/20 × 7 = 189/140 - Subtract the two like fractions:
80/140 - 189/140 = 80 - 189/140 = -109/140
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