Subtract 3/80 from 21/3
1st number: 7 0/3, 2nd number: 3/80
21/3 - 3/80 is 557/80.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 80 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 3 × 80 = 240,
21/3 = 21 × 80/3 × 80 = 1680/240 - Likewise, for the 2nd fraction, since 80 × 3 = 240,
3/80 = 3 × 3/80 × 3 = 9/240 - Subtract the two like fractions:
1680/240 - 9/240 = 1680 - 9/240 = 1671/240 - After reducing the fraction, the answer is 557/80
- In mixed form: 677/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/3-3/80 21/3-6/80 21/6-3/80 63/3-3/80 21/3-9/80 21/9-3/80 21/3-15/80 21/15-3/80 21/3-21/80