Add 45/42 and 72/28
1st number: 1 3/42, 2nd number: 2 16/28
45/42 + 72/28 is 51/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 28 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 42 × 2 = 84,
45/42 = 45 × 2/42 × 2 = 90/84 - Likewise, for the 2nd fraction, since 28 × 3 = 84,
72/28 = 72 × 3/28 × 3 = 216/84 - Add the two like fractions:
90/84 + 216/84 = 90 + 216/84 = 306/84 - 306/84 simplified gives 51/14
- So, 45/42 + 72/28 = 51/14
In mixed form: 39/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/42+72/28 45/84+72/28 45/42+72/56 45/42+72/84