Zubin drew a circle with right triangle prq inscribed in it, as shown below: if the measure of arc qr is 50°, what is the measure of angle pqr?
a. 75
b.50
c. 25
d.65

4/5

Step-by-step explanation:

If we are given this value as a percent we can simply turn that percentage into a fraction. 80% would be 8/10 but since the question wants the fraction in simplest form we can achieve this by dividing both the numerator and denominator by 2. This would give us 4/5, which if we divide the numerator by the denominator we get 0.80 which is 80%. Therefore, the fraction of those surveyed  that had at least one brother or sister is 4/5