Add 81/2 and 9/42
1st number: 40 1/2, 2nd number: 9/42
81/2 + 9/42 is 285/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 42 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 2 × 21 = 42,
81/2 = 81 × 21/2 × 21 = 1701/42 - Likewise, for the 2nd fraction, since 42 × 1 = 42,
9/42 = 9 × 1/42 × 1 = 9/42 - Add the two like fractions:
1701/42 + 9/42 = 1701 + 9/42 = 1710/42 - 1710/42 simplified gives 285/7
- So, 81/2 + 9/42 = 285/7
In mixed form: 405/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/2+18/42 81/4+9/42 81/2+9/84 81/2+27/42 81/6+9/42 81/2+45/42 81/10+9/42 81/2+63/42 81/14+9/42