Table:
compensation received
formal wil
informal wil

proportion
subgroup proportion
proportion
subgroup proportion

percent

academic credit exclusively
5.8
16.8
..
..

payment exclusively
10.5
30.6
65.7
100.0

both academic credit and payment
18.0
52.6
..
..

totals
34.3
100.0
65.7
100.0

Statement: among them, 52.6% received both academic credit and payment.
Question: what was the percentage of those who received both academic credit and payment?
Answer: [52.6]