Subtract 5/80 from 21/6
1st number: 3 3/6, 2nd number: 5/80
21/6 - 5/80 is 55/16.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 80 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 6 × 40 = 240,
21/6 = 21 × 40/6 × 40 = 840/240 - Likewise, for the 2nd fraction, since 80 × 3 = 240,
5/80 = 5 × 3/80 × 3 = 15/240 - Subtract the two like fractions:
840/240 - 15/240 = 840 - 15/240 = 825/240 - After reducing the fraction, the answer is 55/16
- In mixed form: 37/16
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/6-5/80 21/6-10/80 21/12-5/80 63/6-5/80 21/6-15/80 21/18-5/80 21/6-25/80 21/30-5/80 21/6-35/80 21/42-5/80