Add 81/60 and 36/18
1st number: 1 21/60, 2nd number: 2 0/18
81/60 + 36/18 is 67/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 18 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 60 × 3 = 180,
81/60 = 81 × 3/60 × 3 = 243/180 - Likewise, for the 2nd fraction, since 18 × 10 = 180,
36/18 = 36 × 10/18 × 10 = 360/180 - Add the two like fractions:
243/180 + 360/180 = 243 + 360/180 = 603/180 - 603/180 simplified gives 67/20
- So, 81/60 + 36/18 = 67/20
In mixed form: 37/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/60+72/18 81/60+36/54 81/60+36/90