Answer
${$33}$ per hour and $1200$ workers
Work Step by Step
The union was successful in negotiating the raise of $10\%$. The wage before was ${$30}$ per hour, but with a raise, it increases to
$30\times 1.10=\$33$ per hour.
However, in this situation, the number of employed workers decreases by $20\%$, so out of the initial $1500$ workers, the number of workers become:
$1500\times (1-0.20)=1200.$
