Add 70/24 and 36/21
1st number: 2 22/24, 2nd number: 1 15/21
70/24 + 36/21 is 389/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 21 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 24 × 7 = 168,
70/24 = 70 × 7/24 × 7 = 490/168 - Likewise, for the 2nd fraction, since 21 × 8 = 168,
36/21 = 36 × 8/21 × 8 = 288/168 - Add the two like fractions:
490/168 + 288/168 = 490 + 288/168 = 778/168 - 778/168 simplified gives 389/84
- So, 70/24 + 36/21 = 389/84
In mixed form: 453/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/24+72/21 70/48+36/21 70/24+36/42 70/72+36/21 70/24+36/63