Add 15/84 and 7/70
15/84 + 7/70 is 39/140.
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,
15/84 = 15 × 5/84 × 5 = 75/420 - Likewise, for the 2nd fraction, since 70 × 6 = 420,
7/70 = 7 × 6/70 × 6 = 42/420 - Add the two like fractions:
75/420 + 42/420 = 75 + 42/420 = 117/420 - 117/420 simplified gives 39/140
- So, 15/84 + 7/70 = 39/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/84+7/70 15/84+14/70 45/84+7/70 15/84+21/70 75/84+7/70 15/84+35/70 15/84+49/70