Subtract 1/21 from 18/5
1st number: 3 3/5, 2nd number: 1/21
18/5 - 1/21 is 373/105.
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,
18/5 = 18 × 21/5 × 21 = 378/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
1/21 = 1 × 5/21 × 5 = 5/105 - Subtract the two like fractions:
378/105 - 5/105 = 378 - 5/105 = 373/105 - In mixed form: 358/105
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