Step by step
- Find a common denominatorThe lowest common denominator of 3 and 4 is 12.2/3 = (2 × 4)/(3 × 4) = 8/121/4 = (1 × 3)/(4 × 3) = 3/12
- Add the numerators (tops)8/12 + 3/12 = 11/12
Check: 11/12 − 1/4 = 2/3 ✓
Check: 11/12 − 1/4 = 2/3 ✓
Each bar is one whole, split into equal parts.
2/3 plus 1/4 is 11/12. As a decimal it's 0.916667.
Rewrite both fractions with a common denominator, add the numerators, then simplify. The steps above show each line.