Subtract 70/30 from 15/9
1st number: 1 6/9, 2nd number: 2 10/30
15/9 - 70/30 is -2/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 30 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 9 × 10 = 90,
15/9 = 15 × 10/9 × 10 = 150/90 - Likewise, for the 2nd fraction, since 30 × 3 = 90,
70/30 = 70 × 3/30 × 3 = 210/90 - Subtract the two like fractions:
150/90 - 210/90 = 150 - 210/90 = -60/90 - After reducing the fraction, the answer is -2/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/9-70/30 15/18-70/30 15/9-70/60 45/9-70/30 15/27-70/30 15/9-70/90 75/9-70/30 15/45-70/30 15/63-70/30