Add 81/21 and 5/36
1st number: 3 18/21, 2nd number: 5/36
81/21 + 5/36 is 1007/252.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 36 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 21 × 12 = 252,
81/21 = 81 × 12/21 × 12 = 972/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
5/36 = 5 × 7/36 × 7 = 35/252 - Add the two like fractions:
972/252 + 35/252 = 972 + 35/252 = 1007/252 - So, 81/21 + 5/36 = 1007/252
In mixed form: 3251/252
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/21+10/36 81/42+5/36 81/21+5/72 81/21+15/36 81/63+5/36 81/21+25/36 81/21+35/36