Add 80/98 and 20/70
80/98 + 20/70 is 54/49.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 98 and 70 is 490
Next, find the equivalent fraction of both fractional numbers with denominator 490 - For the 1st fraction, since 98 × 5 = 490,
80/98 = 80 × 5/98 × 5 = 400/490 - Likewise, for the 2nd fraction, since 70 × 7 = 490,
20/70 = 20 × 7/70 × 7 = 140/490 - Add the two like fractions:
400/490 + 140/490 = 400 + 140/490 = 540/490 - 540/490 simplified gives 54/49
- So, 80/98 + 20/70 = 54/49
In mixed form: 15/49
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/98+40/70 80/98+60/70