Add 40/21 and 15/24
1st number: 1 19/21, 2nd number: 15/24
40/21 + 15/24 is 425/168.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 24 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
40/21 = 40 × 8/21 × 8 = 320/168 - Likewise, for the 2nd fraction, since 24 × 7 = 168,
15/24 = 15 × 7/24 × 7 = 105/168 - Add the two like fractions:
320/168 + 105/168 = 320 + 105/168 = 425/168 - So, 40/21 + 15/24 = 425/168
In mixed form: 289/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/21+15/24 40/21+30/24 40/42+15/24 40/21+15/48 40/21+45/24 40/63+15/24 40/21+15/72 40/21+75/24