Subtract 30/20 from 28/4
1st number: 7 0/4, 2nd number: 1 10/20
28/4 - 30/20 is 11/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 4 × 5 = 20,
28/4 = 28 × 5/4 × 5 = 140/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
30/20 = 30 × 1/20 × 1 = 30/20 - Subtract the two like fractions:
140/20 - 30/20 = 140 - 30/20 = 110/20 - After reducing the fraction, the answer is 11/2
- In mixed form: 51/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/4-30/20 28/4-60/20 28/8-30/20 28/4-30/40 84/4-30/20 28/4-90/20 28/12-30/20 28/4-30/60 28/20-30/20