Subtract 3/45 from 3/90
3/90 - 3/45 is -1/30.
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,
3/90 = 3 × 1/90 × 1 = 3/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
3/45 = 3 × 2/45 × 2 = 6/90 - Subtract the two like fractions:
3/90 - 6/90 = 3 - 6/90 = -3/90 - After reducing the fraction, the answer is -1/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/90-3/45 3/90-6/45 3/90-3/90 9/90-3/45 3/90-9/45 15/90-3/45 3/90-15/45 21/90-3/45 3/90-21/45