Subtract 4/80 from 30/20
1st number: 1 10/20, 2nd number: 4/80
30/20 - 4/80 is 29/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 20 × 4 = 80,
30/20 = 30 × 4/20 × 4 = 120/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
4/80 = 4 × 1/80 × 1 = 4/80 - Subtract the two like fractions:
120/80 - 4/80 = 120 - 4/80 = 116/80 - After reducing the fraction, the answer is 29/20
- In mixed form: 19/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/20-4/80 30/20-8/80 30/40-4/80 90/20-4/80 30/20-12/80 30/60-4/80 30/20-20/80 30/20-28/80