Add 42/84 and 45/36
1st number: 42/84, 2nd number: 1 9/36
42/84 + 45/36 is 7/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 36 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 84 × 3 = 252,
42/84 = 42 × 3/84 × 3 = 126/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
45/36 = 45 × 7/36 × 7 = 315/252 - Add the two like fractions:
126/252 + 315/252 = 126 + 315/252 = 441/252 - 441/252 simplified gives 7/4
- So, 42/84 + 45/36 = 7/4
In mixed form: 13/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/84+90/36 42/84+45/72