Subtract 30/20 from 45/5
1st number: 9 0/5, 2nd number: 1 10/20
45/5 - 30/20 is 15/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 5 × 4 = 20,
45/5 = 45 × 4/5 × 4 = 180/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
30/20 = 30 × 1/20 × 1 = 30/20 - Subtract the two like fractions:
180/20 - 30/20 = 180 - 30/20 = 150/20 - After reducing the fraction, the answer is 15/2
- In mixed form: 71/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/5-30/20 45/5-60/20 45/10-30/20 45/5-30/40 45/5-90/20 45/15-30/20 45/5-30/60 45/25-30/20 45/35-30/20