Add 15/25 and 25/28
15/25 + 25/28 is 209/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 28 is 700
Next, find the equivalent fraction of both fractional numbers with denominator 700 - For the 1st fraction, since 25 × 28 = 700,
15/25 = 15 × 28/25 × 28 = 420/700 - Likewise, for the 2nd fraction, since 28 × 25 = 700,
25/28 = 25 × 25/28 × 25 = 625/700 - Add the two like fractions:
420/700 + 625/700 = 420 + 625/700 = 1045/700 - 1045/700 simplified gives 209/140
- So, 15/25 + 25/28 = 209/140
In mixed form: 169/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/25+25/28 15/25+50/28 15/50+25/28 15/25+25/56 45/25+25/28 15/25+75/28 15/75+25/28 15/25+25/84 75/25+25/28