Add 3/84 and 84/40
1st number: 3/84, 2nd number: 2 4/40
3/84 + 84/40 is 299/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 84 × 10 = 840,
3/84 = 3 × 10/84 × 10 = 30/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
84/40 = 84 × 21/40 × 21 = 1764/840 - Add the two like fractions:
30/840 + 1764/840 = 30 + 1764/840 = 1794/840 - 1794/840 simplified gives 299/140
- So, 3/84 + 84/40 = 299/140
In mixed form: 219/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/84+84/40 3/84+84/80 9/84+84/40 15/84+84/40 21/84+84/40