Add 90/98 and 30/80
90/98 + 30/80 is 507/392.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 98 and 80 is 3920
Next, find the equivalent fraction of both fractional numbers with denominator 3920 - For the 1st fraction, since 98 × 40 = 3920,
90/98 = 90 × 40/98 × 40 = 3600/3920 - Likewise, for the 2nd fraction, since 80 × 49 = 3920,
30/80 = 30 × 49/80 × 49 = 1470/3920 - Add the two like fractions:
3600/3920 + 1470/3920 = 3600 + 1470/3920 = 5070/3920 - 5070/3920 simplified gives 507/392
- So, 90/98 + 30/80 = 507/392
In mixed form: 1115/392
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/98+60/80 90/98+90/80