Subtract 90/70 from 2/5
1st number: 2/5, 2nd number: 1 20/70
2/5 - 90/70 is -31/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 70 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 5 × 14 = 70,
2/5 = 2 × 14/5 × 14 = 28/70 - Likewise, for the 2nd fraction, since 70 × 1 = 70,
90/70 = 90 × 1/70 × 1 = 90/70 - Subtract the two like fractions:
28/70 - 90/70 = 28 - 90/70 = -62/70 - After reducing the fraction, the answer is -31/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/5-90/70 2/10-90/70 6/5-90/70 2/15-90/70 10/5-90/70 2/25-90/70 14/5-90/70 2/35-90/70