Add 20/70 and 7/30
20/70 + 7/30 is 109/210.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 70 × 3 = 210,
20/70 = 20 × 3/70 × 3 = 60/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
7/30 = 7 × 7/30 × 7 = 49/210 - Add the two like fractions:
60/210 + 49/210 = 60 + 49/210 = 109/210 - So, 20/70 + 7/30 = 109/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/70+7/30 20/70+14/30 20/70+7/60 60/70+7/30 20/70+21/30 20/70+7/90 20/70+35/30 20/70+49/30