Subtract 9/40 from 28/16
1st number: 1 12/16, 2nd number: 9/40
28/16 - 9/40 is 61/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 40 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 16 × 5 = 80,
28/16 = 28 × 5/16 × 5 = 140/80 - Likewise, for the 2nd fraction, since 40 × 2 = 80,
9/40 = 9 × 2/40 × 2 = 18/80 - Subtract the two like fractions:
140/80 - 18/80 = 140 - 18/80 = 122/80 - After reducing the fraction, the answer is 61/40
- In mixed form: 121/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/16-9/40 28/16-18/40 28/32-9/40 28/16-9/80 84/16-9/40 28/16-27/40 28/48-9/40 28/16-45/40 28/80-9/40 28/16-63/40