Add 21/80 and 4/98
21/80 + 4/98 is 1189/3920.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 98 is 3920
Next, find the equivalent fraction of both fractional numbers with denominator 3920 - For the 1st fraction, since 80 × 49 = 3920,
21/80 = 21 × 49/80 × 49 = 1029/3920 - Likewise, for the 2nd fraction, since 98 × 40 = 3920,
4/98 = 4 × 40/98 × 40 = 160/3920 - Add the two like fractions:
1029/3920 + 160/3920 = 1029 + 160/3920 = 1189/3920 - So, 21/80 + 4/98 = 1189/3920
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/80+4/98 21/80+8/98 63/80+4/98 21/80+12/98 21/80+20/98 21/80+28/98