Add 10/36 and 81/21
1st number: 10/36, 2nd number: 3 18/21
10/36 + 81/21 is 521/126.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 21 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 36 × 7 = 252,
10/36 = 10 × 7/36 × 7 = 70/252 - Likewise, for the 2nd fraction, since 21 × 12 = 252,
81/21 = 81 × 12/21 × 12 = 972/252 - Add the two like fractions:
70/252 + 972/252 = 70 + 972/252 = 1042/252 - 1042/252 simplified gives 521/126
- So, 10/36 + 81/21 = 521/126
In mixed form: 417/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/36+81/21 10/72+81/21 10/36+81/42 30/36+81/21 10/36+81/63 50/36+81/21 70/36+81/21