Subtract 4/84 from 42/20
1st number: 2 2/20, 2nd number: 4/84
42/20 - 4/84 is 431/210.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
42/20 = 42 × 21/20 × 21 = 882/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
4/84 = 4 × 5/84 × 5 = 20/420 - Subtract the two like fractions:
882/420 - 20/420 = 882 - 20/420 = 862/420 - After reducing the fraction, the answer is 431/210
- In mixed form: 211/210
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