Add 30/20 and 70/80
1st number: 1 10/20, 2nd number: 70/80
30/20 + 70/80 is 19/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 20 × 4 = 80,
30/20 = 30 × 4/20 × 4 = 120/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
70/80 = 70 × 1/80 × 1 = 70/80 - Add the two like fractions:
120/80 + 70/80 = 120 + 70/80 = 190/80 - 190/80 simplified gives 19/8
- So, 30/20 + 70/80 = 19/8
In mixed form: 23/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/20+70/80 30/40+70/80 90/20+70/80 30/60+70/80