I q test? wat is missing number in this series: 62-52-20-55-27-11-_

kindly give answer step by step. pls

62-52 = 10 x 3 = 30
52-20 = 30 + 5 = 35
20-55 = 35 - 7 = 28
55-27 = 28 / 2 = 14 + 2 = 16
27-11 = 16 X 2 = 32 + 5 = 37
11 - 48 = 37

62 - 55 = 7
55 - 7 = 48

I think it's 48 ! = )

The expanded progression is as follows, I think;

62.0000
85.4609
52.0000
23.0859
20.0000
37.0859
55.0000
53.9609
27.0000
-6.7891
11.0000
191.3359
711.0000

This progression is somewhat similar to the variation of the revolution periods of planets starting from Sun to Saturn, including the periods of the yet undiscovered sub-planets also;