Question

Annie rides her bicycle the 1.5 km to Ben’s house at an average speed of 12 km/h. Calculate the percentage increase that 12 km/h is on Annie’s walking speed of 3.75 km/h.

I just dont understand how to solve this can someone please help

Answer 1

The question is asking you to find how much more quicky Annie is traveling on a bike compared to walking. We simply divide her biking speed by her walking speed to get a factor:
$x = 12 \div 3.75 \\ x = 3.2$

Then we convert this to a percent: 320 percent.

We can say that Annie is traveling 320 percent faster on a bike compared to walking.