Add 20/5 and 70/80
1st number: 4 0/5, 2nd number: 70/80
20/5 + 70/80 is 39/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 5 × 16 = 80,
20/5 = 20 × 16/5 × 16 = 320/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
70/80 = 70 × 1/80 × 1 = 70/80 - Add the two like fractions:
320/80 + 70/80 = 320 + 70/80 = 390/80 - 390/80 simplified gives 39/8
- So, 20/5 + 70/80 = 39/8
In mixed form: 47/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/5+70/80 20/10+70/80 60/5+70/80 20/15+70/80 20/25+70/80 20/35+70/80