Subtract 40/21 from 45/10
1st number: 4 5/10, 2nd number: 1 19/21
45/10 - 40/21 is 109/42.
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,
45/10 = 45 × 21/10 × 21 = 945/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
40/21 = 40 × 10/21 × 10 = 400/210 - Subtract the two like fractions:
945/210 - 400/210 = 945 - 400/210 = 545/210 - After reducing the fraction, the answer is 109/42
- In mixed form: 225/42
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