Add 20/50 and 40/70
20/50 + 40/70 is 34/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 70 is 350
Next, find the equivalent fraction of both fractional numbers with denominator 350 - For the 1st fraction, since 50 × 7 = 350,
20/50 = 20 × 7/50 × 7 = 140/350 - Likewise, for the 2nd fraction, since 70 × 5 = 350,
40/70 = 40 × 5/70 × 5 = 200/350 - Add the two like fractions:
140/350 + 200/350 = 140 + 200/350 = 340/350 - 340/350 simplified gives 34/35
- So, 20/50 + 40/70 = 34/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/50+40/70 20/50+80/70 60/50+40/70