Subtract 72/70 from 45/20
1st number: 2 5/20, 2nd number: 1 2/70
45/20 - 72/70 is 171/140.
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,
45/20 = 45 × 7/20 × 7 = 315/140 - Likewise, for the 2nd fraction, since 70 × 2 = 140,
72/70 = 72 × 2/70 × 2 = 144/140 - Subtract the two like fractions:
315/140 - 144/140 = 315 - 144/140 = 171/140 - In mixed form: 131/140
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