Add 21/40 and 60/9
1st number: 21/40, 2nd number: 6 6/9
21/40 + 60/9 is 863/120.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 9 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
21/40 = 21 × 9/40 × 9 = 189/360 - Likewise, for the 2nd fraction, since 9 × 40 = 360,
60/9 = 60 × 40/9 × 40 = 2400/360 - Add the two like fractions:
189/360 + 2400/360 = 189 + 2400/360 = 2589/360 - 2589/360 simplified gives 863/120
- So, 21/40 + 60/9 = 863/120
In mixed form: 723/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/40+60/9 21/80+60/9 21/40+60/18 63/40+60/9 21/40+60/27 21/40+60/45 21/40+60/63