Subtract 12/15 from 25/90
25/90 - 12/15 is -47/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 15 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
25/90 = 25 × 1/90 × 1 = 25/90 - Likewise, for the 2nd fraction, since 15 × 6 = 90,
12/15 = 12 × 6/15 × 6 = 72/90 - Subtract the two like fractions:
25/90 - 72/90 = 25 - 72/90 = -47/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/90-12/15 25/90-24/15 25/90-12/30 75/90-12/15 25/90-36/15 25/90-12/45 25/90-60/15 25/90-12/75 25/90-84/15