Add 9/40 and 21/5
1st number: 9/40, 2nd number: 4 1/5
9/40 + 21/5 is 177/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 5 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 40 × 1 = 40,
9/40 = 9 × 1/40 × 1 = 9/40 - Likewise, for the 2nd fraction, since 5 × 8 = 40,
21/5 = 21 × 8/5 × 8 = 168/40 - Add the two like fractions:
9/40 + 168/40 = 9 + 168/40 = 177/40 - So, 9/40 + 21/5 = 177/40
In mixed form: 417/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/40+21/5 9/40+42/5 9/80+21/5 9/40+21/10 27/40+21/5 9/40+63/5 9/40+21/15 45/40+21/5 9/40+21/25 63/40+21/5 9/40+21/35