Subtract 21/45 from 18/5
1st number: 3 3/5, 2nd number: 21/45
18/5 - 21/45 is 47/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 45 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 5 × 9 = 45,
18/5 = 18 × 9/5 × 9 = 162/45 - Likewise, for the 2nd fraction, since 45 × 1 = 45,
21/45 = 21 × 1/45 × 1 = 21/45 - Subtract the two like fractions:
162/45 - 21/45 = 162 - 21/45 = 141/45 - After reducing the fraction, the answer is 47/15
- In mixed form: 32/15
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