Add 21/84 and 5/35
21/84 + 5/35 is 11/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 35 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
21/84 = 21 × 5/84 × 5 = 105/420 - Likewise, for the 2nd fraction, since 35 × 12 = 420,
5/35 = 5 × 12/35 × 12 = 60/420 - Add the two like fractions:
105/420 + 60/420 = 105 + 60/420 = 165/420 - 165/420 simplified gives 11/28
- So, 21/84 + 5/35 = 11/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/84+5/35 21/84+10/35 21/84+5/70 63/84+5/35 21/84+15/35 21/84+25/35