Add 15/75 and 18/30
15/75 + 18/30 is 4/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 30 is 150
Next, find the equivalent fraction of both fractional numbers with denominator 150 - For the 1st fraction, since 75 × 2 = 150,
15/75 = 15 × 2/75 × 2 = 30/150 - Likewise, for the 2nd fraction, since 30 × 5 = 150,
18/30 = 18 × 5/30 × 5 = 90/150 - Add the two like fractions:
30/150 + 90/150 = 30 + 90/150 = 120/150 - 120/150 simplified gives 4/5
- So, 15/75 + 18/30 = 4/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/75+18/30 15/75+36/30 15/75+18/60 45/75+18/30 15/75+54/30 15/75+18/90 15/75+90/30