Subtract 18/80 from 28/4
1st number: 7 0/4, 2nd number: 18/80
28/4 - 18/80 is 271/40.
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,
28/4 = 28 × 20/4 × 20 = 560/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
18/80 = 18 × 1/80 × 1 = 18/80 - Subtract the two like fractions:
560/80 - 18/80 = 560 - 18/80 = 542/80 - After reducing the fraction, the answer is 271/40
- In mixed form: 631/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/4-18/80 28/4-36/80 28/8-18/80 84/4-18/80 28/4-54/80 28/12-18/80 28/4-90/80 28/20-18/80