Question

11. A battery was tested and found to power a cassette player for 12 hours. An improved version of the battery powered the cassette player for an extra 30 minutes. Find the percentage increase in the life of the batteries.

PLEASE EXPLAIN STEP BY STEP.

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Answer 1

Answer:

Thus, while it is true that a price increase of 10 % may at first be worked out ... equivalent to a percentage (20%). ... A battery was tested and found to power a cassette player for 12 hours.

Step-by-step explanation:

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Answer 2

Answer:

• work out the difference (increase) between the two numbers you are comparing.
• divide the increase by the original number and multiply the answer by 100. % increase = Increase ÷ Original Number *100.