Subtract 5/90 from 90/40
1st number: 2 10/40, 2nd number: 5/90
90/40 - 5/90 is 79/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 90 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
90/40 = 90 × 9/40 × 9 = 810/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
5/90 = 5 × 4/90 × 4 = 20/360 - Subtract the two like fractions:
810/360 - 20/360 = 810 - 20/360 = 790/360 - After reducing the fraction, the answer is 79/36
- In mixed form: 27/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/40-10/90 90/80-5/90 90/40-15/90 90/40-25/90 90/40-35/90