$$\left. \begin{array} { l } { 62 , 100 = \frac { y - 100 } { 115 \times 100 } = \frac { 100 } { 100 } 1 } \\ { 115 \times 90 } \\ { = 60 , 000 } \end{array} \right.$$
$z=62$
$$100=\frac{y-100}{11500}$$
$$100=\frac{1}{11500}y-\frac{1}{115}$$
$$\frac{1}{11500}y-\frac{1}{115}=100$$
$$\frac{1}{11500}y=100+\frac{1}{115}$$
$$\frac{1}{11500}y=\frac{11501}{115}$$
$$y=\frac{11501}{115}\times 11500$$
$$y=1150100$$
$$y=1150100$$ $$z=62$$
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