Subtract 72/70 from 1/20
1st number: 1/20, 2nd number: 1 2/70
1/20 - 72/70 is -137/140.
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,
1/20 = 1 × 7/20 × 7 = 7/140 - Likewise, for the 2nd fraction, since 70 × 2 = 140,
72/70 = 72 × 2/70 × 2 = 144/140 - Subtract the two like fractions:
7/140 - 144/140 = 7 - 144/140 = -137/140
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