To simplify, let's express the percentages in decimal form:

Given:

1. $0.7x + y = 1.65y$

Rearranging: $0.7x = 0.65y$

Dividing both sides by $y$: $\frac{x}{y} = \frac{0.65}{0.7}$ Since $\frac{0.65}{0.7} < 1$, we have $x < y$. …(i)

2. $0.6x + z = 1.65z$

Rearranging: $0.6x = 0.65z$

Dividing both sides by $z$: $\frac{x}{z} = \frac{0.65}{0.6}$

Since $\frac{0.65}{0.6} > 1$, we have $x > z$. …(ii)

Combining (i) and (ii), we get: $z < x < y$