Add 3/80 and 21/45
3/80 + 21/45 is 121/240.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 45 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
3/80 = 3 × 9/80 × 9 = 27/720 - Likewise, for the 2nd fraction, since 45 × 16 = 720,
21/45 = 21 × 16/45 × 16 = 336/720 - Add the two like fractions:
27/720 + 336/720 = 27 + 336/720 = 363/720 - 363/720 simplified gives 121/240
- So, 3/80 + 21/45 = 121/240
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/80+21/45 3/80+42/45 3/80+21/90 9/80+21/45 3/80+63/45 15/80+21/45 21/80+21/45