Subtract 90/9 from 5/40
1st number: 5/40, 2nd number: 10 0/9
5/40 - 90/9 is -79/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 9 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
5/40 = 5 × 9/40 × 9 = 45/360 - Likewise, for the 2nd fraction, since 9 × 40 = 360,
90/9 = 90 × 40/9 × 40 = 3600/360 - Subtract the two like fractions:
45/360 - 3600/360 = 45 - 3600/360 = -3555/360 - After reducing the fraction, the answer is -79/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/40-90/9 5/80-90/9 5/40-90/18 15/40-90/9 5/40-90/27 25/40-90/9 5/40-90/45 35/40-90/9 5/40-90/63