Add 21/80 and 1/40
21/80 + 1/40 is 23/80.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 40 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 80 × 1 = 80,
21/80 = 21 × 1/80 × 1 = 21/80 - Likewise, for the 2nd fraction, since 40 × 2 = 80,
1/40 = 1 × 2/40 × 2 = 2/80 - Add the two like fractions:
21/80 + 2/80 = 21 + 2/80 = 23/80 - So, 21/80 + 1/40 = 23/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/80+1/40 21/80+2/40 21/80+1/80 63/80+1/40 21/80+3/40 21/80+5/40 21/80+7/40