Answer:
62.5%
Explanation:
Notice that the rate of 5 out of 8 couples, can be also written in quotient form (to actually represent a rate) as: 5/8
That quotient gives us a number that can be written in percent form by multiplying it by 100:
![(5)/(8)= 0.625\\0.625\,*\,100=62.5](https://img.qammunity.org/2021/formulas/mathematics/high-school/eks058xj33ggvdlx7nq3p1ht51qc5lqb4p.png)
Therefore this rate is equivalent to 62.5%