Add 81/12 and 72/35
1st number: 6 9/12, 2nd number: 2 2/35
81/12 + 72/35 is 1233/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 35 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 12 × 35 = 420,
81/12 = 81 × 35/12 × 35 = 2835/420 - Likewise, for the 2nd fraction, since 35 × 12 = 420,
72/35 = 72 × 12/35 × 12 = 864/420 - Add the two like fractions:
2835/420 + 864/420 = 2835 + 864/420 = 3699/420 - 3699/420 simplified gives 1233/140
- So, 81/12 + 72/35 = 1233/140
In mixed form: 8113/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/24+72/35 81/12+72/70 81/36+72/35 81/60+72/35 81/84+72/35