Question

max is training for a triathlon. he recorded the time for each portion of the race during his practices. max wants to know which event had the most improved time.
which event do you think max improved the most in?
running
swimming
biking

Explanation:

Step1: Calculate the percentage of improvement for each event

For running:
$$\frac{12}{80}\times100\% = 15\%$$

Step2: Calculate the percentage of improvement for swimming

For swimming:
$$\frac{12}{60}\times100\%=20\%$$

Step3: Calculate the percentage of improvement for biking

For biking:
$$\frac{9}{90}\times100\% = 10\%$$

Answer:

Swimming