Subtract 21/90 from 24/12
1st number: 2 0/12, 2nd number: 21/90
24/12 - 21/90 is 53/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 12 × 15 = 180,
24/12 = 24 × 15/12 × 15 = 360/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
21/90 = 21 × 2/90 × 2 = 42/180 - Subtract the two like fractions:
360/180 - 42/180 = 360 - 42/180 = 318/180 - After reducing the fraction, the answer is 53/30
- In mixed form: 123/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 48/12-21/90 24/12-42/90 72/12-21/90 24/12-63/90 24/36-21/90 24/60-21/90 24/84-21/90