Add 28/75 and 12/90
28/75 + 12/90 is 38/75.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 90 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 75 × 6 = 450,
28/75 = 28 × 6/75 × 6 = 168/450 - Likewise, for the 2nd fraction, since 90 × 5 = 450,
12/90 = 12 × 5/90 × 5 = 60/450 - Add the two like fractions:
168/450 + 60/450 = 168 + 60/450 = 228/450 - 228/450 simplified gives 38/75
- So, 28/75 + 12/90 = 38/75
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/75+12/90 28/75+24/90 84/75+12/90 28/75+36/90 28/75+60/90 28/75+84/90