Given data:
Percentage of workers like oranges = 87%
Percentage of workers like apples = 53%
Percentage of workers like both oranges and apples = x%
Then,
n(A∪B) = n(A) + n(B)- n(A∩B)
100 = 87 +53 - n(A∩B)
n(A∩B) = 40%
Percentage of workers who likes both the fruit = 40%.