Add 81/4 and 64/10
1st number: 20 1/4, 2nd number: 6 4/10
81/4 + 64/10 is 533/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 10 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 4 × 5 = 20,
81/4 = 81 × 5/4 × 5 = 405/20 - Likewise, for the 2nd fraction, since 10 × 2 = 20,
64/10 = 64 × 2/10 × 2 = 128/20 - Add the two like fractions:
405/20 + 128/20 = 405 + 128/20 = 533/20 - So, 81/4 + 64/10 = 533/20
In mixed form: 2613/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/8+64/10 81/4+64/20 81/12+64/10 81/4+64/30 81/20+64/10 81/4+64/50 81/28+64/10 81/4+64/70