Subtract 84/5 from 4/21
1st number: 4/21, 2nd number: 16 4/5
4/21 - 84/5 is -1744/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 5 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
4/21 = 4 × 5/21 × 5 = 20/105 - Likewise, for the 2nd fraction, since 5 × 21 = 105,
84/5 = 84 × 21/5 × 21 = 1764/105 - Subtract the two like fractions:
20/105 - 1764/105 = 20 - 1764/105 = -1744/105
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