Add 9/84 and 15/70
9/84 + 15/70 is 9/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 70 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
9/84 = 9 × 5/84 × 5 = 45/420 - Likewise, for the 2nd fraction, since 70 × 6 = 420,
15/70 = 15 × 6/70 × 6 = 90/420 - Add the two like fractions:
45/420 + 90/420 = 45 + 90/420 = 135/420 - 135/420 simplified gives 9/28
- So, 9/84 + 15/70 = 9/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/84+15/70 9/84+30/70 27/84+15/70 9/84+45/70 45/84+15/70 9/84+75/70 63/84+15/70