Add 42/84 and 5/7
42/84 + 5/7 is 17/14.
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,
42/84 = 42 × 1/84 × 1 = 42/84 - Likewise, for the 2nd fraction, since 7 × 12 = 84,
5/7 = 5 × 12/7 × 12 = 60/84 - Add the two like fractions:
42/84 + 60/84 = 42 + 60/84 = 102/84 - 102/84 simplified gives 17/14
- So, 42/84 + 5/7 = 17/14
In mixed form: 13/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/84+10/7 42/84+5/14 42/84+15/7 42/84+5/21 42/84+25/7 42/84+5/35 42/84+35/7 42/84+5/49