Subtract 80/21 from 7/10
1st number: 7/10, 2nd number: 3 17/21
7/10 - 80/21 is -653/210.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 10 × 21 = 210,
7/10 = 7 × 21/10 × 21 = 147/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
80/21 = 80 × 10/21 × 10 = 800/210 - Subtract the two like fractions:
147/210 - 800/210 = 147 - 800/210 = -653/210
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