Subtract 72/70 from 5/21
1st number: 5/21, 2nd number: 1 2/70
5/21 - 72/70 is -83/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
5/21 = 5 × 10/21 × 10 = 50/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
72/70 = 72 × 3/70 × 3 = 216/210 - Subtract the two like fractions:
50/210 - 216/210 = 50 - 216/210 = -166/210 - After reducing the fraction, the answer is -83/105
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