Subtract 40/70 from 10/20
10/20 - 40/70 is -1/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 70 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
10/20 = 10 × 7/20 × 7 = 70/140 - Likewise, for the 2nd fraction, since 70 × 2 = 140,
40/70 = 40 × 2/70 × 2 = 80/140 - Subtract the two like fractions:
70/140 - 80/140 = 70 - 80/140 = -10/140 - After reducing the fraction, the answer is -1/14
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