Subtract 21/90 from 12/3
1st number: 4 0/3, 2nd number: 21/90
12/3 - 21/90 is 113/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 3 × 30 = 90,
12/3 = 12 × 30/3 × 30 = 360/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
21/90 = 21 × 1/90 × 1 = 21/90 - Subtract the two like fractions:
360/90 - 21/90 = 360 - 21/90 = 339/90 - After reducing the fraction, the answer is 113/30
- In mixed form: 323/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/3-21/90 12/3-42/90 12/6-21/90 36/3-21/90 12/3-63/90 12/9-21/90 60/3-21/90 12/15-21/90 84/3-21/90 12/21-21/90