Add 21/6 and 3/40
1st number: 3 3/6, 2nd number: 3/40
21/6 + 3/40 is 143/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 6 × 20 = 120,
21/6 = 21 × 20/6 × 20 = 420/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
3/40 = 3 × 3/40 × 3 = 9/120 - Add the two like fractions:
420/120 + 9/120 = 420 + 9/120 = 429/120 - 429/120 simplified gives 143/40
- So, 21/6 + 3/40 = 143/40
In mixed form: 323/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/6+3/40 21/6+6/40 21/12+3/40 21/6+3/80 63/6+3/40 21/6+9/40 21/18+3/40 21/6+15/40 21/30+3/40 21/6+21/40 21/42+3/40