Subtract 70/9 from 9/30
1st number: 9/30, 2nd number: 7 7/9
9/30 - 70/9 is -673/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 9 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
9/30 = 9 × 3/30 × 3 = 27/90 - Likewise, for the 2nd fraction, since 9 × 10 = 90,
70/9 = 70 × 10/9 × 10 = 700/90 - Subtract the two like fractions:
27/90 - 700/90 = 27 - 700/90 = -673/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/30-70/9 9/60-70/9 9/30-70/18 27/30-70/9 9/90-70/9 9/30-70/27 45/30-70/9 9/30-70/45 63/30-70/9 9/30-70/63