Add 21/80 and 4/36
21/80 + 4/36 is 269/720.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 36 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
21/80 = 21 × 9/80 × 9 = 189/720 - Likewise, for the 2nd fraction, since 36 × 20 = 720,
4/36 = 4 × 20/36 × 20 = 80/720 - Add the two like fractions:
189/720 + 80/720 = 189 + 80/720 = 269/720 - So, 21/80 + 4/36 = 269/720
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/80+4/36 21/80+8/36 21/80+4/72 63/80+4/36 21/80+12/36 21/80+20/36 21/80+28/36