Subtract 21/40 from 45/6
1st number: 7 3/6, 2nd number: 21/40
45/6 - 21/40 is 279/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 6 × 20 = 120,
45/6 = 45 × 20/6 × 20 = 900/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
21/40 = 21 × 3/40 × 3 = 63/120 - Subtract the two like fractions:
900/120 - 63/120 = 900 - 63/120 = 837/120 - After reducing the fraction, the answer is 279/40
- In mixed form: 639/40
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