Question

Each hour, the temperature rose by 1 and 1/2 degrees. What was the change in temperature in 1 and 1/2 hours?

Answer 1

Divide both numbers by 2 to get 3/4 degrees per 30 mins.

Now, multiply both numbers by 3 to get 9/4 degrees per 90 mins.

Simplify: 2 1/4 per 1 1/2 hours.

The answer is C.