Subtract 8/6 from 90/70
1st number: 1 20/70, 2nd number: 1 2/6
90/70 - 8/6 is -1/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 6 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 70 × 3 = 210,
90/70 = 90 × 3/70 × 3 = 270/210 - Likewise, for the 2nd fraction, since 6 × 35 = 210,
8/6 = 8 × 35/6 × 35 = 280/210 - Subtract the two like fractions:
270/210 - 280/210 = 270 - 280/210 = -10/210 - After reducing the fraction, the answer is -1/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/70-16/6 90/70-8/12 90/70-24/6 90/70-8/18 90/70-40/6 90/70-8/30 90/70-56/6 90/70-8/42