Subtract 4/8 from 45/18
1st number: 2 9/18, 2nd number: 4/8
45/18 - 4/8 is 2/1.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 8 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 18 × 4 = 72,
45/18 = 45 × 4/18 × 4 = 180/72 - Likewise, for the 2nd fraction, since 8 × 9 = 72,
4/8 = 4 × 9/8 × 9 = 36/72 - Subtract the two like fractions:
180/72 - 36/72 = 180 - 36/72 = 144/72 - After reducing the fraction, the answer is 2/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/18-4/8 45/36-4/8 45/18-4/16 45/18-12/8 45/54-4/8 45/18-4/24 45/18-20/8 45/90-4/8 45/18-4/40 45/18-28/8 45/18-4/56