Subtract 21/9 from 70/10
1st number: 7 0/10, 2nd number: 2 3/9
70/10 - 21/9 is 14/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 9 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 10 × 9 = 90,
70/10 = 70 × 9/10 × 9 = 630/90 - Likewise, for the 2nd fraction, since 9 × 10 = 90,
21/9 = 21 × 10/9 × 10 = 210/90 - Subtract the two like fractions:
630/90 - 210/90 = 630 - 210/90 = 420/90 - After reducing the fraction, the answer is 14/3
- In mixed form: 42/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/10-42/9 70/20-21/9 70/10-21/18 70/10-63/9 70/30-21/9 70/10-21/27 70/50-21/9 70/10-21/45 70/10-21/63