Add 25/28 and 20/42
25/28 + 20/42 is 115/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 42 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 28 × 3 = 84,
25/28 = 25 × 3/28 × 3 = 75/84 - Likewise, for the 2nd fraction, since 42 × 2 = 84,
20/42 = 20 × 2/42 × 2 = 40/84 - Add the two like fractions:
75/84 + 40/84 = 75 + 40/84 = 115/84 - So, 25/28 + 20/42 = 115/84
In mixed form: 131/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/28+20/42 25/28+40/42 25/56+20/42 25/28+20/84 75/28+20/42 25/28+60/42 25/84+20/42