Subtract 90/12 from 40/4
1st number: 10 0/4, 2nd number: 7 6/12
40/4 - 90/12 is 5/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 12 is 12
Next, find the equivalent fraction of both fractional numbers with denominator 12 - For the 1st fraction, since 4 × 3 = 12,
40/4 = 40 × 3/4 × 3 = 120/12 - Likewise, for the 2nd fraction, since 12 × 1 = 12,
90/12 = 90 × 1/12 × 1 = 90/12 - Subtract the two like fractions:
120/12 - 90/12 = 120 - 90/12 = 30/12 - After reducing the fraction, the answer is 5/2
- In mixed form: 21/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/4-90/12 40/8-90/12 40/4-90/24 40/12-90/12 40/4-90/36 40/20-90/12 40/4-90/60 40/28-90/12 40/4-90/84