Add 15/42 and 21/75
15/42 + 21/75 is 223/350.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 75 is 1050
Next, find the equivalent fraction of both fractional numbers with denominator 1050 - For the 1st fraction, since 42 × 25 = 1050,
15/42 = 15 × 25/42 × 25 = 375/1050 - Likewise, for the 2nd fraction, since 75 × 14 = 1050,
21/75 = 21 × 14/75 × 14 = 294/1050 - Add the two like fractions:
375/1050 + 294/1050 = 375 + 294/1050 = 669/1050 - 669/1050 simplified gives 223/350
- So, 15/42 + 21/75 = 223/350
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/42+21/75 15/42+42/75 15/84+21/75 45/42+21/75 15/42+63/75 75/42+21/75