Add 3/40 and 21/36
3/40 + 21/36 is 79/120.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 36 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
3/40 = 3 × 9/40 × 9 = 27/360 - Likewise, for the 2nd fraction, since 36 × 10 = 360,
21/36 = 21 × 10/36 × 10 = 210/360 - Add the two like fractions:
27/360 + 210/360 = 27 + 210/360 = 237/360 - 237/360 simplified gives 79/120
- So, 3/40 + 21/36 = 79/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/40+21/36 3/40+42/36 3/80+21/36 3/40+21/72 9/40+21/36 3/40+63/36 15/40+21/36 21/40+21/36