Subtract 21/5 from 1/84
1st number: 1/84, 2nd number: 4 1/5
1/84 - 21/5 is -1759/420.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 5 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
1/84 = 1 × 5/84 × 5 = 5/420 - Likewise, for the 2nd fraction, since 5 × 84 = 420,
21/5 = 21 × 84/5 × 84 = 1764/420 - Subtract the two like fractions:
5/420 - 1764/420 = 5 - 1764/420 = -1759/420
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