Subtract 90/20 from 40/4
1st number: 10 0/4, 2nd number: 4 10/20
40/4 - 90/20 is 11/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 4 × 5 = 20,
40/4 = 40 × 5/4 × 5 = 200/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
90/20 = 90 × 1/20 × 1 = 90/20 - Subtract the two like fractions:
200/20 - 90/20 = 200 - 90/20 = 110/20 - After reducing the fraction, the answer is 11/2
- In mixed form: 51/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/4-90/20 40/8-90/20 40/4-90/40 40/12-90/20 40/4-90/60 40/20-90/20 40/28-90/20