4 years ago

HELP REALLY QUICK 20 POINTS!

Mathematics

2 answers:

Molodets [167]4 years ago

8 0

The answer should be 18%

BartSMP [9]4 years ago

5 0

Answer:

18%

Step-by-step explanation:

To calculate percentage improvement use

percentage improvement = $\frac{improvement}{original}$ × 100%

Change time to seconds

3 minutes 20 sec = (3 × 60) + 20 = 200 seconds

2 minutes 44 seconds = (2 × 60) + 44 = 164 seconds

improvement time = 200 - 164 = 36 seconds, hence

percentage improvement = $\frac{36}{200}$ × 100% = 18%

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