Subtract 50/72 from 90/40
1st number: 2 10/40, 2nd number: 50/72
90/40 - 50/72 is 14/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 72 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 72 × 5 = 360,
50/72 = 50 × 5/72 × 5 = 250/360 - Subtract the two like fractions:
810/360 - 250/360 = 810 - 250/360 = 560/360 - After reducing the fraction, the answer is 14/9
- In mixed form: 15/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/80-50/72