Add 72/84 and 7/30
72/84 + 7/30 is 229/210.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 30 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
72/84 = 72 × 5/84 × 5 = 360/420 - Likewise, for the 2nd fraction, since 30 × 14 = 420,
7/30 = 7 × 14/30 × 14 = 98/420 - Add the two like fractions:
360/420 + 98/420 = 360 + 98/420 = 458/420 - 458/420 simplified gives 229/210
- So, 72/84 + 7/30 = 229/210
In mixed form: 119/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/84+14/30 72/84+7/60 72/84+21/30 72/84+7/90 72/84+35/30 72/84+49/30