Add 70/36 and 24/21
1st number: 1 34/36, 2nd number: 1 3/21
70/36 + 24/21 is 389/126.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 21 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 36 × 7 = 252,
70/36 = 70 × 7/36 × 7 = 490/252 - Likewise, for the 2nd fraction, since 21 × 12 = 252,
24/21 = 24 × 12/21 × 12 = 288/252 - Add the two like fractions:
490/252 + 288/252 = 490 + 288/252 = 778/252 - 778/252 simplified gives 389/126
- So, 70/36 + 24/21 = 389/126
In mixed form: 311/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/36+48/21 70/72+24/21 70/36+24/42 70/36+72/21 70/36+24/63