Add 21/49 and 45/80
21/49 + 45/80 is 111/112.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 80 is 3920
Next, find the equivalent fraction of both fractional numbers with denominator 3920 - For the 1st fraction, since 49 × 80 = 3920,
21/49 = 21 × 80/49 × 80 = 1680/3920 - Likewise, for the 2nd fraction, since 80 × 49 = 3920,
45/80 = 45 × 49/80 × 49 = 2205/3920 - Add the two like fractions:
1680/3920 + 2205/3920 = 1680 + 2205/3920 = 3885/3920 - 3885/3920 simplified gives 111/112
- So, 21/49 + 45/80 = 111/112
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/49+45/80 21/49+90/80 21/98+45/80 63/49+45/80