Add 20/30 and 15/63
20/30 + 15/63 is 19/21.
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,
20/30 = 20 × 21/30 × 21 = 420/630 - Likewise, for the 2nd fraction, since 63 × 10 = 630,
15/63 = 15 × 10/63 × 10 = 150/630 - Add the two like fractions:
420/630 + 150/630 = 420 + 150/630 = 570/630 - 570/630 simplified gives 19/21
- So, 20/30 + 15/63 = 19/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/30+15/63 20/30+30/63 20/60+15/63 60/30+15/63 20/30+45/63 20/90+15/63 20/30+75/63