Add 10/45 and 20/30
10/45 + 20/30 is 8/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 30 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 45 × 2 = 90,
10/45 = 10 × 2/45 × 2 = 20/90 - Likewise, for the 2nd fraction, since 30 × 3 = 90,
20/30 = 20 × 3/30 × 3 = 60/90 - Add the two like fractions:
20/90 + 60/90 = 20 + 60/90 = 80/90 - 80/90 simplified gives 8/9
- So, 10/45 + 20/30 = 8/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/45+20/30 10/45+40/30 10/90+20/30 10/45+20/60 30/45+20/30 10/45+60/30 10/45+20/90 50/45+20/30 70/45+20/30