Subtract 90/70 from 10/25
1st number: 10/25, 2nd number: 1 20/70
10/25 - 90/70 is -31/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 70 is 350
Next, find the equivalent fraction of both fractional numbers with denominator 350 - For the 1st fraction, since 25 × 14 = 350,
10/25 = 10 × 14/25 × 14 = 140/350 - Likewise, for the 2nd fraction, since 70 × 5 = 350,
90/70 = 90 × 5/70 × 5 = 450/350 - Subtract the two like fractions:
140/350 - 450/350 = 140 - 450/350 = -310/350 - 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: 20/25-90/70 10/50-90/70 30/25-90/70 10/75-90/70 50/25-90/70 70/25-90/70