Add 20/40 and 7/70
20/40 + 7/70 is 3/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 70 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 40 × 7 = 280,
20/40 = 20 × 7/40 × 7 = 140/280 - Likewise, for the 2nd fraction, since 70 × 4 = 280,
7/70 = 7 × 4/70 × 4 = 28/280 - Add the two like fractions:
140/280 + 28/280 = 140 + 28/280 = 168/280 - 168/280 simplified gives 3/5
- So, 20/40 + 7/70 = 3/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/40+14/70 20/80+7/70 60/40+7/70 20/40+21/70 20/40+35/70 20/40+49/70