Subtract 90/5 from 7/4
1st number: 1 3/4, 2nd number: 18 0/5
7/4 - 90/5 is -65/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 5 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 4 × 5 = 20,
7/4 = 7 × 5/4 × 5 = 35/20 - Likewise, for the 2nd fraction, since 5 × 4 = 20,
90/5 = 90 × 4/5 × 4 = 360/20 - Subtract the two like fractions:
35/20 - 360/20 = 35 - 360/20 = -325/20 - After reducing the fraction, the answer is -65/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/4-90/5 7/8-90/5 7/4-90/10 21/4-90/5 7/12-90/5 7/4-90/15 35/4-90/5 7/20-90/5 7/4-90/25 49/4-90/5 7/28-90/5 7/4-90/35