Add 70/40 and 3/15
1st number: 1 30/40, 2nd number: 3/15
70/40 + 3/15 is 39/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 15 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 40 × 3 = 120,
70/40 = 70 × 3/40 × 3 = 210/120 - Likewise, for the 2nd fraction, since 15 × 8 = 120,
3/15 = 3 × 8/15 × 8 = 24/120 - Add the two like fractions:
210/120 + 24/120 = 210 + 24/120 = 234/120 - 234/120 simplified gives 39/20
- So, 70/40 + 3/15 = 39/20
In mixed form: 119/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/40+6/15 70/80+3/15 70/40+3/30 70/40+9/15 70/40+3/45 70/40+3/75 70/40+21/15