Add 20/30 and 12/45
20/30 + 12/45 is 14/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 45 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
20/30 = 20 × 3/30 × 3 = 60/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
12/45 = 12 × 2/45 × 2 = 24/90 - Add the two like fractions:
60/90 + 24/90 = 60 + 24/90 = 84/90 - 84/90 simplified gives 14/15
- So, 20/30 + 12/45 = 14/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/30+12/45 20/30+24/45 20/60+12/45 20/30+12/90 60/30+12/45 20/30+36/45 20/90+12/45 20/30+60/45 20/30+84/45