Add 9/6 and 40/21
1st number: 1 3/6, 2nd number: 1 19/21
9/6 + 40/21 is 143/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 6 × 7 = 42,
9/6 = 9 × 7/6 × 7 = 63/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
40/21 = 40 × 2/21 × 2 = 80/42 - Add the two like fractions:
63/42 + 80/42 = 63 + 80/42 = 143/42 - So, 9/6 + 40/21 = 143/42
In mixed form: 317/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/6+40/21 9/6+80/21 9/12+40/21 9/6+40/42 27/6+40/21 9/18+40/21 9/6+40/63 45/6+40/21 9/30+40/21 63/6+40/21 9/42+40/21