Subtract 70/21 from 50/9
1st number: 5 5/9, 2nd number: 3 7/21
50/9 - 70/21 is 20/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 21 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 9 × 7 = 63,
50/9 = 50 × 7/9 × 7 = 350/63 - Likewise, for the 2nd fraction, since 21 × 3 = 63,
70/21 = 70 × 3/21 × 3 = 210/63 - Subtract the two like fractions:
350/63 - 210/63 = 350 - 210/63 = 140/63 - After reducing the fraction, the answer is 20/9
- In mixed form: 22/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/18-70/21 50/9-70/42 50/27-70/21 50/9-70/63 50/45-70/21 50/63-70/21