Subtract 45/21 from 40/4
1st number: 10 0/4, 2nd number: 2 3/21
40/4 - 45/21 is 55/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 4 × 21 = 84,
40/4 = 40 × 21/4 × 21 = 840/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
45/21 = 45 × 4/21 × 4 = 180/84 - Subtract the two like fractions:
840/84 - 180/84 = 840 - 180/84 = 660/84 - After reducing the fraction, the answer is 55/7
- In mixed form: 76/7
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