Subtract 20/30 from 45/20
1st number: 2 5/20, 2nd number: 20/30
45/20 - 20/30 is 19/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 30 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
45/20 = 45 × 3/20 × 3 = 135/60 - Likewise, for the 2nd fraction, since 30 × 2 = 60,
20/30 = 20 × 2/30 × 2 = 40/60 - Subtract the two like fractions:
135/60 - 40/60 = 135 - 40/60 = 95/60 - After reducing the fraction, the answer is 19/12
- In mixed form: 17/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/20-20/30 45/20-40/30 45/40-20/30 45/20-20/60 45/20-60/30 45/60-20/30 45/20-20/90