Subtract 20/8 from 45/20
1st number: 2 5/20, 2nd number: 2 4/8
45/20 - 20/8 is -1/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 8 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 20 × 2 = 40,
45/20 = 45 × 2/20 × 2 = 90/40 - Likewise, for the 2nd fraction, since 8 × 5 = 40,
20/8 = 20 × 5/8 × 5 = 100/40 - Subtract the two like fractions:
90/40 - 100/40 = 90 - 100/40 = -10/40 - After reducing the fraction, the answer is -1/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/20-20/8 45/20-40/8 45/40-20/8 45/20-20/16 45/20-60/8 45/60-20/8 45/20-20/24 45/20-20/40 45/20-20/56