Add 8/84 and 42/7
1st number: 8/84, 2nd number: 6 0/7
8/84 + 42/7 is 128/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 7 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 7 × 12 = 84,
42/7 = 42 × 12/7 × 12 = 504/84 - Add the two like fractions:
8/84 + 504/84 = 8 + 504/84 = 512/84 - 512/84 simplified gives 128/21
- So, 8/84 + 42/7 = 128/21
In mixed form: 62/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/84+42/7 8/84+84/7 8/84+42/14 24/84+42/7 8/84+42/21 40/84+42/7 8/84+42/35 56/84+42/7 8/84+42/49