Subtract 21/90 from 12/2
1st number: 6 0/2, 2nd number: 21/90
12/2 - 21/90 is 173/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 2 × 45 = 90,
12/2 = 12 × 45/2 × 45 = 540/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
21/90 = 21 × 1/90 × 1 = 21/90 - Subtract the two like fractions:
540/90 - 21/90 = 540 - 21/90 = 519/90 - After reducing the fraction, the answer is 173/30
- In mixed form: 523/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/2-21/90 12/2-42/90 12/4-21/90 36/2-21/90 12/2-63/90 12/6-21/90 60/2-21/90 12/10-21/90 84/2-21/90 12/14-21/90