Add 21/3 and 45/80
1st number: 7 0/3, 2nd number: 45/80
21/3 + 45/80 is 121/16.
Steps for adding 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,
45/80 = 45 × 3/80 × 3 = 135/240 - Add the two like fractions:
1680/240 + 135/240 = 1680 + 135/240 = 1815/240 - 1815/240 simplified gives 121/16
- So, 21/3 + 45/80 = 121/16
In mixed form: 79/16
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/3+45/80 21/3+90/80 21/6+45/80 63/3+45/80 21/9+45/80 21/15+45/80