Add 81/40 and 24/20
1st number: 2 1/40, 2nd number: 1 4/20
81/40 + 24/20 is 129/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 20 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 20 × 2 = 40,
24/20 = 24 × 2/20 × 2 = 48/40 - Add the two like fractions:
81/40 + 48/40 = 81 + 48/40 = 129/40 - So, 81/40 + 24/20 = 129/40
In mixed form: 39/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/40+48/20 81/80+24/20 81/40+24/40 81/40+72/20 81/40+24/60