Subtract 21/40 from 36/18
1st number: 2 0/18, 2nd number: 21/40
36/18 - 21/40 is 59/40.
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,
36/18 = 36 × 20/18 × 20 = 720/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
21/40 = 21 × 9/40 × 9 = 189/360 - Subtract the two like fractions:
720/360 - 189/360 = 720 - 189/360 = 531/360 - After reducing the fraction, the answer is 59/40
- In mixed form: 119/40
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