Subtract 72/21 from 7/70
1st number: 7/70, 2nd number: 3 9/21
7/70 - 72/21 is -233/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 70 × 3 = 210,
7/70 = 7 × 3/70 × 3 = 21/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
72/21 = 72 × 10/21 × 10 = 720/210 - Subtract the two like fractions:
21/210 - 720/210 = 21 - 720/210 = -699/210 - After reducing the fraction, the answer is -233/70
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