Add 72/84 and 7/8
72/84 + 7/8 is 97/56.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 8 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 84 × 2 = 168,
72/84 = 72 × 2/84 × 2 = 144/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
7/8 = 7 × 21/8 × 21 = 147/168 - Add the two like fractions:
144/168 + 147/168 = 144 + 147/168 = 291/168 - 291/168 simplified gives 97/56
- So, 72/84 + 7/8 = 97/56
In mixed form: 141/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/84+14/8 72/84+7/16 72/84+21/8 72/84+7/24 72/84+35/8 72/84+7/40 72/84+49/8 72/84+7/56