Add 30/18 and 40/25
1st number: 1 12/18, 2nd number: 1 15/25
30/18 + 40/25 is 49/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 25 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 18 × 25 = 450,
30/18 = 30 × 25/18 × 25 = 750/450 - Likewise, for the 2nd fraction, since 25 × 18 = 450,
40/25 = 40 × 18/25 × 18 = 720/450 - Add the two like fractions:
750/450 + 720/450 = 750 + 720/450 = 1470/450 - 1470/450 simplified gives 49/15
- So, 30/18 + 40/25 = 49/15
In mixed form: 34/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/18+40/25 30/18+80/25 30/36+40/25 30/18+40/50 90/18+40/25 30/54+40/25 30/18+40/75 30/90+40/25