3 seconds and what are you saying need more information
Answer:
3/5 , 0.6, 60%
3/4 , 0.75, 75%
4/5 , 0.80, 80%
9/10 , 0.9, 90%
and the last one should be 2/2 , 1. , 100%
You can always match 4 points using a cubic polynomial. A graphing calculator can find a cubic regression equation for you. This set of points is matched by
.. y = x^3 +3x^2 +5x +3