In figure 1, we can see that 4 parts out of 9 are shaded and 5 parts are unshaded. So, the ratio of shaded to the unshaded parts is 4:5.
In figure 2, we can see that 2 parts out of 9 are shaded and 7 parts are unshaded. So, the ratio of shaded to the unshaded parts is 2:7.
In figure 3,we can see that 6 parts out of 8 are shaded and 2 parts are unshaded. So, the ratio of shaded to the unshaded parts is 6:2.