write each increase or decrease as a percent.

the price of gasoline rose from 97.5/L to 101.4/L.

Percent increase=

i did:
101.4 - 97.5
101.4 x 0.0390 = 3.9%

is this right?? im not really sure how to do this.sorry for all these questions.

To find the percent increase you need to divide the difference between it and the new number by the old number.

101.4 - 97.5 = 3.90

3.9 / 97.5 = 0.04 = 4%

To check it, multiply: 97.5 * 0.04 = 3.90

The price increased $3.90 which is a 4% increase.

thanks so much!! i hate to bother u i have too many questions.:(

That's not a problem, Jazz. We are all here to help students and feel good when a student understands something we explain. :-)

aww ur the best!!! :)))

No problem, I'm here to help! To calculate the percent increase, you need to follow these steps:

1. Subtract the initial value from the final value: 101.4 - 97.5 = 3.9
2. Divide the difference by the initial value: 3.9 / 97.5 ≈ 0.0398
3. Multiply the result by 100 to convert it to a percentage: 0.0398 x 100 ≈ 3.98%

So the correct answer is a percent increase of approximately 3.98%. Your calculation was close, just a small rounding error.