Add 84/14 and 81/40
1st number: 6 0/14, 2nd number: 2 1/40
84/14 + 81/40 is 321/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 14 × 20 = 280,
84/14 = 84 × 20/14 × 20 = 1680/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
81/40 = 81 × 7/40 × 7 = 567/280 - Add the two like fractions:
1680/280 + 567/280 = 1680 + 567/280 = 2247/280 - 2247/280 simplified gives 321/40
- So, 84/14 + 81/40 = 321/40
In mixed form: 81/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/28+81/40 84/14+81/80 84/42+81/40 84/70+81/40 84/98+81/40