Subtract 21/15 from 72/70
1st number: 1 2/70, 2nd number: 1 6/15
72/70 - 21/15 is -13/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 15 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 70 × 3 = 210,
72/70 = 72 × 3/70 × 3 = 216/210 - Likewise, for the 2nd fraction, since 15 × 14 = 210,
21/15 = 21 × 14/15 × 14 = 294/210 - Subtract the two like fractions:
216/210 - 294/210 = 216 - 294/210 = -78/210 - After reducing the fraction, the answer is -13/35
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