Add 30/45 and 9/42
30/45 + 9/42 is 37/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 42 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 45 × 14 = 630,
30/45 = 30 × 14/45 × 14 = 420/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
9/42 = 9 × 15/42 × 15 = 135/630 - Add the two like fractions:
420/630 + 135/630 = 420 + 135/630 = 555/630 - 555/630 simplified gives 37/42
- So, 30/45 + 9/42 = 37/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/45+9/42 30/45+18/42 30/90+9/42 30/45+9/84 90/45+9/42 30/45+27/42 30/45+45/42 30/45+63/42