Add 21/40 and 48/9
1st number: 21/40, 2nd number: 5 3/9
21/40 + 48/9 is 703/120.
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,
48/9 = 48 × 40/9 × 40 = 1920/360 - Add the two like fractions:
189/360 + 1920/360 = 189 + 1920/360 = 2109/360 - 2109/360 simplified gives 703/120
- So, 21/40 + 48/9 = 703/120
In mixed form: 5103/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/40+48/9 21/40+96/9 21/80+48/9 21/40+48/18 63/40+48/9 21/40+48/27 21/40+48/45 21/40+48/63