Add 25/30 and 20/28
25/30 + 20/28 is 65/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 28 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 30 × 14 = 420,
25/30 = 25 × 14/30 × 14 = 350/420 - Likewise, for the 2nd fraction, since 28 × 15 = 420,
20/28 = 20 × 15/28 × 15 = 300/420 - Add the two like fractions:
350/420 + 300/420 = 350 + 300/420 = 650/420 - 650/420 simplified gives 65/42
- So, 25/30 + 20/28 = 65/42
In mixed form: 123/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/30+20/28 25/30+40/28 25/60+20/28 25/30+20/56 75/30+20/28 25/30+60/28 25/90+20/28 25/30+20/84