Subtract 40/42 from 21/6
1st number: 3 3/6, 2nd number: 40/42
21/6 - 40/42 is 107/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 42 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 6 × 7 = 42,
21/6 = 21 × 7/6 × 7 = 147/42 - Likewise, for the 2nd fraction, since 42 × 1 = 42,
40/42 = 40 × 1/42 × 1 = 40/42 - Subtract the two like fractions:
147/42 - 40/42 = 147 - 40/42 = 107/42 - In mixed form: 223/42
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