Subtract 90/8 from 70/4
1st number: 17 2/4, 2nd number: 11 2/8
70/4 - 90/8 is 25/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 8 is 8
Next, find the equivalent fraction of both fractional numbers with denominator 8 - For the 1st fraction, since 4 × 2 = 8,
70/4 = 70 × 2/4 × 2 = 140/8 - Likewise, for the 2nd fraction, since 8 × 1 = 8,
90/8 = 90 × 1/8 × 1 = 90/8 - Subtract the two like fractions:
140/8 - 90/8 = 140 - 90/8 = 50/8 - After reducing the fraction, the answer is 25/4
- In mixed form: 61/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/8-90/8 70/4-90/16 70/12-90/8 70/4-90/24 70/20-90/8 70/4-90/40 70/28-90/8 70/4-90/56