Tami once rode the stationary bike 20.5 miles per day. Now she is able to go 35.5 miles. What is her percent of increase rounded to the nearest whole percent?

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Percentage increase is given by the increase divided by the initial value, times 100%.

Example
I eat 10 apples in a month. Now, I decide to eat 15 apples in a month.

The increase is 15-10 = 5 apples

The percentage increase is = \frac{5}{10} \times 100% = 50%

Now, do it with your problem and post your answer. :)

Percentage increase is given by the increase divided by the initial value, times 100%.

Example
I eat 10 apples in a month. Now, I decide to eat 15 apples in a month.

The increase is 15-10 = 5 apples

The percentage increase is = \frac{5}{10} \times 100% = 50%

Now, do it with your problem and post your answer. :)

Sorry Unky... I didn't know. Kit:)

Sorry Unky...I didn't know. Kit:)

It's all good, no worries, you can continue telling people that they shouldn't post their homework, which is good. :)

I try to help by giving examples instead of the actual answers, except in exceptional cases ;)