Add 90/98 and 10/80
90/98 + 10/80 is 409/392.
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,
10/80 = 10 × 49/80 × 49 = 490/3920 - Add the two like fractions:
3600/3920 + 490/3920 = 3600 + 490/3920 = 4090/3920 - 4090/3920 simplified gives 409/392
- So, 90/98 + 10/80 = 409/392
In mixed form: 117/392
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/98+20/80 90/98+30/80 90/98+50/80 90/98+70/80