Subtract 21/45 from 21/20
1st number: 1 1/20, 2nd number: 21/45
21/20 - 21/45 is 7/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
21/20 = 21 × 9/20 × 9 = 189/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
21/45 = 21 × 4/45 × 4 = 84/180 - Subtract the two like fractions:
189/180 - 84/180 = 189 - 84/180 = 105/180 - After reducing the fraction, the answer is 7/12
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