The equation is ($13.00- $.25) =$13.00 Marietta's hourly wage before the raise was $($12.75). $13.00- $.25 = $12.75 Marietta received a raise that was less than $1.00 per hour, so her new hourly wage should be less than $($12.75)+ $1 = $13.75. Her new hourly wage of $13.00 is less than $13.75, so the answer is reasonable .25 per hour add to $12.75 = $13.00 per hour