Subtract 72/10 from 18/70
1st number: 18/70, 2nd number: 7 2/10
18/70 - 72/10 is -243/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 10 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 70 × 1 = 70,
18/70 = 18 × 1/70 × 1 = 18/70 - Likewise, for the 2nd fraction, since 10 × 7 = 70,
72/10 = 72 × 7/10 × 7 = 504/70 - Subtract the two like fractions:
18/70 - 504/70 = 18 - 504/70 = -486/70 - After reducing the fraction, the answer is -243/35
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