Subtract 84/45 from 18/80
1st number: 18/80, 2nd number: 1 39/45
18/80 - 84/45 is -197/120.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 45 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
18/80 = 18 × 9/80 × 9 = 162/720 - Likewise, for the 2nd fraction, since 45 × 16 = 720,
84/45 = 84 × 16/45 × 16 = 1344/720 - Subtract the two like fractions:
162/720 - 1344/720 = 162 - 1344/720 = -1182/720 - After reducing the fraction, the answer is -197/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/80-84/45 18/80-84/90 54/80-84/45 90/80-84/45