Subtract 21/80 from 20/18
1st number: 1 2/18, 2nd number: 21/80
20/18 - 21/80 is 611/720.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 18 × 40 = 720,
20/18 = 20 × 40/18 × 40 = 800/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
21/80 = 21 × 9/80 × 9 = 189/720 - Subtract the two like fractions:
800/720 - 189/720 = 800 - 189/720 = 611/720
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