Subtract 45/20 from 4/16
1st number: 4/16, 2nd number: 2 5/20
4/16 - 45/20 is -2/1.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 20 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 16 × 5 = 80,
4/16 = 4 × 5/16 × 5 = 20/80 - Likewise, for the 2nd fraction, since 20 × 4 = 80,
45/20 = 45 × 4/20 × 4 = 180/80 - Subtract the two like fractions:
20/80 - 180/80 = 20 - 180/80 = -160/80 - 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: 8/16-45/20 4/16-90/20 4/32-45/20 4/16-45/40 12/16-45/20 4/48-45/20 4/16-45/60 20/16-45/20 4/80-45/20 28/16-45/20