Add 9/42 and 27/45
9/42 + 27/45 is 57/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 45 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 42 × 15 = 630,
9/42 = 9 × 15/42 × 15 = 135/630 - Likewise, for the 2nd fraction, since 45 × 14 = 630,
27/45 = 27 × 14/45 × 14 = 378/630 - Add the two like fractions:
135/630 + 378/630 = 135 + 378/630 = 513/630 - 513/630 simplified gives 57/70
- So, 9/42 + 27/45 = 57/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/42+27/45 9/42+54/45 9/84+27/45 9/42+27/90 27/42+27/45 9/42+81/45 45/42+27/45 63/42+27/45