Subtract 4/80 from 30/4
1st number: 7 2/4, 2nd number: 4/80
30/4 - 4/80 is 149/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 4 × 20 = 80,
30/4 = 30 × 20/4 × 20 = 600/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
4/80 = 4 × 1/80 × 1 = 4/80 - Subtract the two like fractions:
600/80 - 4/80 = 600 - 4/80 = 596/80 - After reducing the fraction, the answer is 149/20
- In mixed form: 79/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/4-4/80 30/4-8/80 30/8-4/80 90/4-4/80 30/4-12/80 30/12-4/80 30/4-20/80 30/20-4/80 30/4-28/80 30/28-4/80