Subtract 16/80 from 21/6
1st number: 3 3/6, 2nd number: 16/80
21/6 - 16/80 is 33/10.
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,
16/80 = 16 × 3/80 × 3 = 48/240 - Subtract the two like fractions:
840/240 - 48/240 = 840 - 48/240 = 792/240 - After reducing the fraction, the answer is 33/10
- In mixed form: 33/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/6-16/80 21/6-32/80 21/12-16/80 63/6-16/80 21/6-48/80 21/18-16/80 21/30-16/80 21/42-16/80