Add 28/42 and 25/30
28/42 + 25/30 is 3/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
28/42 = 28 × 5/42 × 5 = 140/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
25/30 = 25 × 7/30 × 7 = 175/210 - Add the two like fractions:
140/210 + 175/210 = 140 + 175/210 = 315/210 - 315/210 simplified gives 3/2
- So, 28/42 + 25/30 = 3/2
In mixed form: 11/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/42+25/30 28/42+50/30 28/84+25/30 28/42+25/60 84/42+25/30 28/42+75/30 28/42+25/90