Add 7/30 and 70/84
7/30 + 70/84 is 16/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 30 × 14 = 420,
7/30 = 7 × 14/30 × 14 = 98/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
70/84 = 70 × 5/84 × 5 = 350/420 - Add the two like fractions:
98/420 + 350/420 = 98 + 350/420 = 448/420 - 448/420 simplified gives 16/15
- So, 7/30 + 70/84 = 16/15
In mixed form: 11/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/30+70/84 7/60+70/84 21/30+70/84 7/90+70/84 35/30+70/84 49/30+70/84