Add 21/40 and 45/5
1st number: 21/40, 2nd number: 9 0/5
21/40 + 45/5 is 381/40.
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,
21/40 = 21 × 1/40 × 1 = 21/40 - Likewise, for the 2nd fraction, since 5 × 8 = 40,
45/5 = 45 × 8/5 × 8 = 360/40 - Add the two like fractions:
21/40 + 360/40 = 21 + 360/40 = 381/40 - So, 21/40 + 45/5 = 381/40
In mixed form: 921/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/40+45/5 21/40+90/5 21/80+45/5 21/40+45/10 63/40+45/5 21/40+45/15 21/40+45/25 21/40+45/35