Subtract 45/10 from 80/21
1st number: 3 17/21, 2nd number: 4 5/10
80/21 - 45/10 is -29/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 10 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 10 × 21 = 210,
45/10 = 45 × 21/10 × 21 = 945/210 - Subtract the two like fractions:
800/210 - 945/210 = 800 - 945/210 = -145/210 - After reducing the fraction, the answer is -29/42
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