Add 15/25 and 30/42
15/25 + 30/42 is 46/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 42 is 1050
Next, find the equivalent fraction of both fractional numbers with denominator 1050 - For the 1st fraction, since 25 × 42 = 1050,
15/25 = 15 × 42/25 × 42 = 630/1050 - Likewise, for the 2nd fraction, since 42 × 25 = 1050,
30/42 = 30 × 25/42 × 25 = 750/1050 - Add the two like fractions:
630/1050 + 750/1050 = 630 + 750/1050 = 1380/1050 - 1380/1050 simplified gives 46/35
- So, 15/25 + 30/42 = 46/35
In mixed form: 111/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/25+30/42 15/25+60/42 15/50+30/42 15/25+30/84 45/25+30/42 15/25+90/42 15/75+30/42 75/25+30/42