Add 81/4 and 42/27
1st number: 20 1/4, 2nd number: 1 15/27
81/4 + 42/27 is 785/36.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 27 is 108
Next, find the equivalent fraction of both fractional numbers with denominator 108 - For the 1st fraction, since 4 × 27 = 108,
81/4 = 81 × 27/4 × 27 = 2187/108 - Likewise, for the 2nd fraction, since 27 × 4 = 108,
42/27 = 42 × 4/27 × 4 = 168/108 - Add the two like fractions:
2187/108 + 168/108 = 2187 + 168/108 = 2355/108 - 2355/108 simplified gives 785/36
- So, 81/4 + 42/27 = 785/36
In mixed form: 2129/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/4+84/27 81/8+42/27 81/4+42/54 81/12+42/27 81/4+42/81 81/20+42/27 81/28+42/27