For a gross income of $£52000$£52000, calculate the net income when:
Tax is $£11100$£11100 and superannuation is $£2500$£2500
Tax is $£14000$£14000, superannuation is $£3200$£3200 and insurance is $£2600$£2600
Tax is $£12600$£12600, rent is $£12500$£12500 and union fees are $£800$£800
Bill earns $£843.50$£843.50 per week and has the following deductions from his gross wage: Tax $£253.05$£253.05, superannuation $£85$£85 and union fees $£25.61$£25.61.
Christa earns $£2563.65$£2563.65 every two weeks and has the following deductions from her gross wage: tax at $£559.17$£559.17, superannuation at $£79$£79 and union fees at $£22.47$£22.47.
If tax is stated as being $15.9$15.9 pence in the pound, what percentage tax is this?