Subtract 25/45 from 1/90
1/90 - 25/45 is -49/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 45 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
1/90 = 1 × 1/90 × 1 = 1/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
25/45 = 25 × 2/45 × 2 = 50/90 - Subtract the two like fractions:
1/90 - 50/90 = 1 - 50/90 = -49/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/90-25/45 1/90-50/45 1/90-25/90 3/90-25/45 1/90-75/45 5/90-25/45 7/90-25/45