Subtract 49/20 from 10/42
1st number: 10/42, 2nd number: 2 9/20
10/42 - 49/20 is -929/420.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 42 × 10 = 420,
10/42 = 10 × 10/42 × 10 = 100/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
49/20 = 49 × 21/20 × 21 = 1029/420 - Subtract the two like fractions:
100/420 - 1029/420 = 100 - 1029/420 = -929/420
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