Subtract 8/70 from 90/21
1st number: 4 6/21, 2nd number: 8/70
90/21 - 8/70 is 146/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
90/21 = 90 × 10/21 × 10 = 900/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
8/70 = 8 × 3/70 × 3 = 24/210 - Subtract the two like fractions:
900/210 - 24/210 = 900 - 24/210 = 876/210 - After reducing the fraction, the answer is 146/35
- In mixed form: 46/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/21-16/70 90/42-8/70 90/21-24/70 90/63-8/70 90/21-40/70 90/21-56/70