Subtract 21/40 from 54/18
1st number: 3 0/18, 2nd number: 21/40
54/18 - 21/40 is 99/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 18 × 20 = 360,
54/18 = 54 × 20/18 × 20 = 1080/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
21/40 = 21 × 9/40 × 9 = 189/360 - Subtract the two like fractions:
1080/360 - 189/360 = 1080 - 189/360 = 891/360 - After reducing the fraction, the answer is 99/40
- In mixed form: 219/40
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