Subtract 12/90 from 2/5
2/5 - 12/90 is 4/15.
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,
2/5 = 2 × 18/5 × 18 = 36/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
12/90 = 12 × 1/90 × 1 = 12/90 - Subtract the two like fractions:
36/90 - 12/90 = 36 - 12/90 = 24/90 - After reducing the fraction, the answer is 4/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/5-12/90 2/5-24/90 2/10-12/90 6/5-12/90 2/5-36/90 2/15-12/90 10/5-12/90 2/5-60/90 2/25-12/90 14/5-12/90 2/5-84/90 2/35-12/90