Subtract 40/42 from 21/14
1st number: 1 7/14, 2nd number: 40/42
21/14 - 40/42 is 23/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 42 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 14 × 3 = 42,
21/14 = 21 × 3/14 × 3 = 63/42 - Likewise, for the 2nd fraction, since 42 × 1 = 42,
40/42 = 40 × 1/42 × 1 = 40/42 - Subtract the two like fractions:
63/42 - 40/42 = 63 - 40/42 = 23/42
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