Add 81/40 and 20/4
1st number: 2 1/40, 2nd number: 5 0/4
81/40 + 20/4 is 281/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 4 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 40 × 1 = 40,
81/40 = 81 × 1/40 × 1 = 81/40 - Likewise, for the 2nd fraction, since 4 × 10 = 40,
20/4 = 20 × 10/4 × 10 = 200/40 - Add the two like fractions:
81/40 + 200/40 = 81 + 200/40 = 281/40 - So, 81/40 + 20/4 = 281/40
In mixed form: 71/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/40+40/4 81/80+20/4 81/40+20/8 81/40+60/4 81/40+20/12 81/40+20/28