Add 15/12 and 30/40
1st number: 1 3/12, 2nd number: 30/40
15/12 + 30/40 is 2/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 12 × 10 = 120,
15/12 = 15 × 10/12 × 10 = 150/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
30/40 = 30 × 3/40 × 3 = 90/120 - Add the two like fractions:
150/120 + 90/120 = 150 + 90/120 = 240/120 - 240/120 simplified gives 2/1
- So, 15/12 + 30/40 = 2/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/12+30/40 15/12+60/40 15/24+30/40 15/12+30/80 45/12+30/40 15/12+90/40 15/36+30/40 75/12+30/40 15/60+30/40 15/84+30/40