Subtract 98/18 from 45/40
1st number: 1 5/40, 2nd number: 5 8/18
45/40 - 98/18 is -311/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 18 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
45/40 = 45 × 9/40 × 9 = 405/360 - Likewise, for the 2nd fraction, since 18 × 20 = 360,
98/18 = 98 × 20/18 × 20 = 1960/360 - Subtract the two like fractions:
405/360 - 1960/360 = 405 - 1960/360 = -1555/360 - After reducing the fraction, the answer is -311/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/40-98/18 45/80-98/18 45/40-98/36 45/40-98/54 45/40-98/90