Subtract 4/21 from 42/5
1st number: 8 2/5, 2nd number: 4/21
42/5 - 4/21 is 862/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 21 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 5 × 21 = 105,
42/5 = 42 × 21/5 × 21 = 882/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
4/21 = 4 × 5/21 × 5 = 20/105 - Subtract the two like fractions:
882/105 - 20/105 = 882 - 20/105 = 862/105 - In mixed form: 822/105
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