Using proportions, it is found that your net income after travel expenses is of $52.46.
A proportion is a fraction of a total amount, and the measures are related using a rule of three.
You work 12 hours, hence the income before taxes is given by:
I = 12 x 7.45 = $89.4.
Considering the three taxes and the travel reduction, the net income will be given by:
N = 0.9235 x 0.8935 x 0.943 x 89.4 - 3 x 5.7 = $52.46.
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