Add 18/30 and 56/63
18/30 + 56/63 is 67/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 63 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 30 × 21 = 630,
18/30 = 18 × 21/30 × 21 = 378/630 - Likewise, for the 2nd fraction, since 63 × 10 = 630,
56/63 = 56 × 10/63 × 10 = 560/630 - Add the two like fractions:
378/630 + 560/630 = 378 + 560/630 = 938/630 - 938/630 simplified gives 67/45
- So, 18/30 + 56/63 = 67/45
In mixed form: 122/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/30+56/63 18/60+56/63 54/30+56/63 18/90+56/63 90/30+56/63