book Maths Puzzle Numerical Ability

i need you to show me the steps in finding the right answer for the following problem: Marla begins walking at 3mi/h toward the library. Her friend meets her at the halfway point a

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1.You are driving at a constant speed of 60 miles per hour, how long will it take you to travel 270 miles?
2.You are driving at a constant speed of 65 miles per hour, how long will it take you to travel 280 miles? How do I solve this problem?

The interest rate on an auto loan in May was 12 3/8%. By September the rate was up to 14 1/4%. How many percentage points did the interest rate increase over the period?

Thanks, She