Subtract 90/4 from 70/10
1st number: 7 0/10, 2nd number: 22 2/4
70/10 - 90/4 is -31/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 4 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 10 × 2 = 20,
70/10 = 70 × 2/10 × 2 = 140/20 - Likewise, for the 2nd fraction, since 4 × 5 = 20,
90/4 = 90 × 5/4 × 5 = 450/20 - Subtract the two like fractions:
140/20 - 450/20 = 140 - 450/20 = -310/20 - After reducing the fraction, the answer is -31/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/20-90/4 70/10-90/8 70/30-90/4 70/10-90/12 70/50-90/4 70/10-90/20 70/10-90/28