Add 20/84 and 36/5
1st number: 20/84, 2nd number: 7 1/5
20/84 + 36/5 is 781/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 5 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
20/84 = 20 × 5/84 × 5 = 100/420 - Likewise, for the 2nd fraction, since 5 × 84 = 420,
36/5 = 36 × 84/5 × 84 = 3024/420 - Add the two like fractions:
100/420 + 3024/420 = 100 + 3024/420 = 3124/420 - 3124/420 simplified gives 781/105
- So, 20/84 + 36/5 = 781/105
In mixed form: 746/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/84+36/5 20/84+72/5 20/84+36/10 60/84+36/5 20/84+36/15 20/84+36/25 20/84+36/35