Subtract 80/18 from 1/40
1st number: 1/40, 2nd number: 4 8/18
1/40 - 80/18 is -1591/360.
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,
1/40 = 1 × 9/40 × 9 = 9/360 - Likewise, for the 2nd fraction, since 18 × 20 = 360,
80/18 = 80 × 20/18 × 20 = 1600/360 - Subtract the two like fractions:
9/360 - 1600/360 = 9 - 1600/360 = -1591/360
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/40-80/18 1/80-80/18 1/40-80/36 3/40-80/18 1/40-80/54 5/40-80/18 1/40-80/90 7/40-80/18