Add 21/6 and 70/80
1st number: 3 3/6, 2nd number: 70/80
21/6 + 70/80 is 35/8.
Steps for adding 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,
70/80 = 70 × 3/80 × 3 = 210/240 - Add the two like fractions:
840/240 + 210/240 = 840 + 210/240 = 1050/240 - 1050/240 simplified gives 35/8
- So, 21/6 + 70/80 = 35/8
In mixed form: 43/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/6+70/80 21/12+70/80 63/6+70/80 21/18+70/80 21/30+70/80 21/42+70/80