Add 15/84 and 9/20
15/84 + 9/20 is 22/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
15/84 = 15 × 5/84 × 5 = 75/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
9/20 = 9 × 21/20 × 21 = 189/420 - Add the two like fractions:
75/420 + 189/420 = 75 + 189/420 = 264/420 - 264/420 simplified gives 22/35
- So, 15/84 + 9/20 = 22/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/84+9/20 15/84+18/20 15/84+9/40 45/84+9/20 15/84+27/20 15/84+9/60 75/84+9/20 15/84+45/20 15/84+63/20