Part a). 6/9(2/3 simplified)
Part b). 66.67%
a). A fraction represents parts to the whole. In this case, we are asked to compare the shaded region to the whole figure. There are 6 triangles shaded, and 9 triangles total, so we would write our fraction as 6/9, which simplifies to 2/3.
b). In order to find the percentage, you take the fraction's decimal value and multiply it by 100.
Calculations :
2/3 = 0.66.....(goes on forever)
0.66....... * 100 = 66.6.....%
round ≈ 66.67%
That's it!