Add 21/15 and 40/10
1st number: 1 6/15, 2nd number: 4 0/10
21/15 + 40/10 is 27/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 10 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 15 × 2 = 30,
21/15 = 21 × 2/15 × 2 = 42/30 - Likewise, for the 2nd fraction, since 10 × 3 = 30,
40/10 = 40 × 3/10 × 3 = 120/30 - Add the two like fractions:
42/30 + 120/30 = 42 + 120/30 = 162/30 - 162/30 simplified gives 27/5
- So, 21/15 + 40/10 = 27/5
In mixed form: 52/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/15+40/10 21/15+80/10 21/30+40/10 21/15+40/20 63/15+40/10 21/45+40/10 21/15+40/30 21/75+40/10 21/15+40/50 21/15+40/70