Subtract 45/6 from 20/21
1st number: 20/21, 2nd number: 7 3/6
20/21 - 45/6 is -275/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 6 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
20/21 = 20 × 2/21 × 2 = 40/42 - Likewise, for the 2nd fraction, since 6 × 7 = 42,
45/6 = 45 × 7/6 × 7 = 315/42 - Subtract the two like fractions:
40/42 - 315/42 = 40 - 315/42 = -275/42
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