Subtract 3/4 from 45/20
1st number: 2 5/20, 2nd number: 3/4
45/20 - 3/4 is 3/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 4 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 20 × 1 = 20,
45/20 = 45 × 1/20 × 1 = 45/20 - Likewise, for the 2nd fraction, since 4 × 5 = 20,
3/4 = 3 × 5/4 × 5 = 15/20 - Subtract the two like fractions:
45/20 - 15/20 = 45 - 15/20 = 30/20 - After reducing the fraction, the answer is 3/2
- In mixed form: 11/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/20-3/4 45/20-6/4 45/40-3/4 45/20-3/8 45/20-9/4 45/60-3/4 45/20-3/12 45/20-15/4 45/20-3/20 45/20-21/4 45/20-3/28