Add 70/20 and 80/49
1st number: 3 10/20, 2nd number: 1 31/49
70/20 + 80/49 is 503/98.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 49 is 980
Next, find the equivalent fraction of both fractional numbers with denominator 980 - For the 1st fraction, since 20 × 49 = 980,
70/20 = 70 × 49/20 × 49 = 3430/980 - Likewise, for the 2nd fraction, since 49 × 20 = 980,
80/49 = 80 × 20/49 × 20 = 1600/980 - Add the two like fractions:
3430/980 + 1600/980 = 3430 + 1600/980 = 5030/980 - 5030/980 simplified gives 503/98
- So, 70/20 + 80/49 = 503/98
In mixed form: 513/98
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/40+80/49 70/20+80/98 70/60+80/49