You're Right!


Figure 1 has 30 circles. 15 of those circles are shaded green. We can say that 15/30 of the circles are green, or we can use the greatest common factor (G.C.F.) of 15 and 30 to simplify the fraction.


The G.C.F. of 15 and 30 is 15.

15 divided by 15 = 1
30 divided by 15 = 2

So, 15/30 = 1/2.




Go to next question.