Add 15/30 and 8/20
15/30 + 8/20 is 9/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 30 × 2 = 60,
15/30 = 15 × 2/30 × 2 = 30/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
8/20 = 8 × 3/20 × 3 = 24/60 - Add the two like fractions:
30/60 + 24/60 = 30 + 24/60 = 54/60 - 54/60 simplified gives 9/10
- So, 15/30 + 8/20 = 9/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 15/30+16/20 15/60+8/20 15/30+8/40 45/30+8/20 15/30+24/20 15/90+8/20 15/30+8/60 75/30+8/20 15/30+40/20 15/30+56/20