Answer:
$67.50
Step-by-step explanation:
Method 1
original rate = $12.50 per hour
therefore, money earned in 15 hours = 15 x 12.50 = $187.50
new rate = 12.50 + 4.50 = $17 per hour
therefore, money earned in 15 hours = 15 x 17 = $255.00
255 - 187.50 = $67.50
Therefore, Kate earns $67.50 more after the raise.
Method 2
As the raise is an additional $4.50 per hour, simply multiple 4.50 by 15 to calculate the extra money Kate earns:
4.5 x 15 = 67.50
