Add 20/5 and 20/70
1st number: 4 0/5, 2nd number: 20/70
20/5 + 20/70 is 30/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 70 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 5 × 14 = 70,
20/5 = 20 × 14/5 × 14 = 280/70 - Likewise, for the 2nd fraction, since 70 × 1 = 70,
20/70 = 20 × 1/70 × 1 = 20/70 - Add the two like fractions:
280/70 + 20/70 = 280 + 20/70 = 300/70 - 300/70 simplified gives 30/7
- So, 20/5 + 20/70 = 30/7
In mixed form: 42/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/5+20/70 20/5+40/70 20/10+20/70 60/5+20/70 20/5+60/70 20/15+20/70 20/25+20/70 20/35+20/70