Add 8/84 and 1/21
8/84 + 1/21 is 1/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
8/84 = 8 × 1/84 × 1 = 8/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
1/21 = 1 × 4/21 × 4 = 4/84 - Add the two like fractions:
8/84 + 4/84 = 8 + 4/84 = 12/84 - 12/84 simplified gives 1/7
- So, 8/84 + 1/21 = 1/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/84+1/21 8/84+2/21 8/84+1/42 24/84+1/21 8/84+3/21 8/84+1/63 40/84+1/21 8/84+5/21 56/84+1/21 8/84+7/21