Fill in the number of safety rules: 1 / 2, 8 / 13, 21 / 34, (), (), ()

Fill in the number of safety rules: 1 / 2, 8 / 13, 21 / 34, (), (), ()

1 / 2, 3 / 5, 8 / 13, 21 / 34, (55 / 89), (144 / 233), (377 / 310)
The sum of the numerator and the denominator of the previous fraction is the numerator, and the sum of the numerator and the previous denominator is the denominator