Add 15/2 and 63/81
1st number: 7 1/2, 2nd number: 63/81
15/2 + 63/81 is 149/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 81 is 162
Next, find the equivalent fraction of both fractional numbers with denominator 162 - For the 1st fraction, since 2 × 81 = 162,
15/2 = 15 × 81/2 × 81 = 1215/162 - Likewise, for the 2nd fraction, since 81 × 2 = 162,
63/81 = 63 × 2/81 × 2 = 126/162 - Add the two like fractions:
1215/162 + 126/162 = 1215 + 126/162 = 1341/162 - 1341/162 simplified gives 149/18
- So, 15/2 + 63/81 = 149/18
In mixed form: 85/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/2+63/81 15/4+63/81 45/2+63/81 15/6+63/81 75/2+63/81 15/10+63/81 15/14+63/81