Add 9/42 and 45/4
1st number: 9/42, 2nd number: 11 1/4
9/42 + 45/4 is 321/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 4 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 42 × 2 = 84,
9/42 = 9 × 2/42 × 2 = 18/84 - Likewise, for the 2nd fraction, since 4 × 21 = 84,
45/4 = 45 × 21/4 × 21 = 945/84 - Add the two like fractions:
18/84 + 945/84 = 18 + 945/84 = 963/84 - 963/84 simplified gives 321/28
- So, 9/42 + 45/4 = 321/28
In mixed form: 1113/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/42+45/4 9/42+90/4 9/84+45/4 9/42+45/8 27/42+45/4 9/42+45/12 45/42+45/4 9/42+45/20 63/42+45/4 9/42+45/28