Tze Han has $X he intends to spend 30% of it on food and 5 percent of the remainder on stationery the leftover will be deposited into the ba

Food = 0.3X

left = 0.7X

stationary = 0.05*0.7X = 0.035X

Food Plus stationary = 0.335X

Left for banking = X-0.335X = (1-0.335)X = 0.665X

$$\\\text{a.)}\;0.300*x=30\%*x\\
\text{b.)}\;0.035*x=(1-0.3)*0.05*x=(1-30\%)*5\%*x\\
\text{c.)}\;0.665*x=(1-0.05)*0.7*x=(1-5\%)*(1-30\%)*x\\
\sum =1.000*x$$

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