Subtract 2/7 from 7/20
7/20 - 2/7 is 9/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 7 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
7/20 = 7 × 7/20 × 7 = 49/140 - Likewise, for the 2nd fraction, since 7 × 20 = 140,
2/7 = 2 × 20/7 × 20 = 40/140 - Subtract the two like fractions:
49/140 - 40/140 = 49 - 40/140 = 9/140
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