Subtract 35/70 from 80/21
1st number: 3 17/21, 2nd number: 35/70
80/21 - 35/70 is 139/42.
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,
80/21 = 80 × 10/21 × 10 = 800/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
35/70 = 35 × 3/70 × 3 = 105/210 - Subtract the two like fractions:
800/210 - 105/210 = 800 - 105/210 = 695/210 - After reducing the fraction, the answer is 139/42
- In mixed form: 313/42
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