Add 15/5 and 20/84
1st number: 3 0/5, 2nd number: 20/84
15/5 + 20/84 is 68/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 5 × 84 = 420,
15/5 = 15 × 84/5 × 84 = 1260/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
20/84 = 20 × 5/84 × 5 = 100/420 - Add the two like fractions:
1260/420 + 100/420 = 1260 + 100/420 = 1360/420 - 1360/420 simplified gives 68/21
- So, 15/5 + 20/84 = 68/21
In mixed form: 35/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/5+20/84 15/5+40/84 15/10+20/84 45/5+20/84 15/5+60/84 75/5+20/84 15/25+20/84 15/35+20/84