Subtract 70/9 from 40/8
1st number: 5 0/8, 2nd number: 7 7/9
40/8 - 70/9 is -25/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 9 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 8 × 9 = 72,
40/8 = 40 × 9/8 × 9 = 360/72 - Likewise, for the 2nd fraction, since 9 × 8 = 72,
70/9 = 70 × 8/9 × 8 = 560/72 - Subtract the two like fractions:
360/72 - 560/72 = 360 - 560/72 = -200/72 - After reducing the fraction, the answer is -25/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/8-70/9 40/16-70/9 40/8-70/18 40/24-70/9 40/8-70/27 40/8-70/45 40/56-70/9 40/8-70/63