Subtract 30/40 from 28/8
1st number: 3 4/8, 2nd number: 30/40
28/8 - 30/40 is 11/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 8 × 5 = 40,
28/8 = 28 × 5/8 × 5 = 140/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
30/40 = 30 × 1/40 × 1 = 30/40 - Subtract the two like fractions:
140/40 - 30/40 = 140 - 30/40 = 110/40 - After reducing the fraction, the answer is 11/4
- In mixed form: 23/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/8-30/40 28/8-60/40 28/16-30/40 28/8-30/80 84/8-30/40 28/8-90/40 28/24-30/40 28/40-30/40 28/56-30/40