Subtract 9/90 from 12/5
1st number: 2 2/5, 2nd number: 9/90
12/5 - 9/90 is 23/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 5 × 18 = 90,
12/5 = 12 × 18/5 × 18 = 216/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
9/90 = 9 × 1/90 × 1 = 9/90 - Subtract the two like fractions:
216/90 - 9/90 = 216 - 9/90 = 207/90 - After reducing the fraction, the answer is 23/10
- In mixed form: 23/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/5-9/90 12/5-18/90 12/10-9/90 36/5-9/90 12/5-27/90 12/15-9/90 60/5-9/90 12/5-45/90 12/25-9/90 84/5-9/90 12/5-63/90 12/35-9/90