Add 84/18 and 70/49
1st number: 4 12/18, 2nd number: 1 21/49
84/18 + 70/49 is 128/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 49 is 882
Next, find the equivalent fraction of both fractional numbers with denominator 882 - For the 1st fraction, since 18 × 49 = 882,
84/18 = 84 × 49/18 × 49 = 4116/882 - Likewise, for the 2nd fraction, since 49 × 18 = 882,
70/49 = 70 × 18/49 × 18 = 1260/882 - Add the two like fractions:
4116/882 + 1260/882 = 4116 + 1260/882 = 5376/882 - 5376/882 simplified gives 128/21
- So, 84/18 + 70/49 = 128/21
In mixed form: 62/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/36+70/49 84/18+70/98 84/54+70/49 84/90+70/49