Add 12/30 and 15/8
1st number: 12/30, 2nd number: 1 7/8
12/30 + 15/8 is 91/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 8 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 30 × 4 = 120,
12/30 = 12 × 4/30 × 4 = 48/120 - Likewise, for the 2nd fraction, since 8 × 15 = 120,
15/8 = 15 × 15/8 × 15 = 225/120 - Add the two like fractions:
48/120 + 225/120 = 48 + 225/120 = 273/120 - 273/120 simplified gives 91/40
- So, 12/30 + 15/8 = 91/40
In mixed form: 211/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/30+15/8 12/30+30/8 12/60+15/8 12/30+15/16 36/30+15/8 12/30+45/8 12/90+15/8 12/30+15/24 60/30+15/8 12/30+75/8 12/30+15/40 84/30+15/8 12/30+15/56