To determine if Sara and Ali have finished the same amount of their buildings, we can compare the fractions of their projects that are complete.
Sara's building is one third finished, which can be expressed as: \[ \frac{1}{3} \]
Ali's building is three ninths finished. The fraction three ninths can be simplified: \[ \frac{3}{9} = \frac{1}{3} \]
Now we compare the two fractions:
- Sara's completed fraction: \(\frac{1}{3}\)
- Ali's completed fraction: \(\frac{1}{3}\)
Since both fractions are equal, we can conclude that Ali and Sara have finished the same amount of their buildings.