## danijo1814 2 years ago Am I remembering how to solve percentage increase right?

1. danijo1814

Each year, Terrell buys a plane ticket to visit his grandmother for a week. Last year, he paid $130. This year, he paid$143. What was the percent increase in the cost of his plane ticket? Show your work.

2. danijo1814

that is the question this is my answer: amount of change/original amount = percent of change/100 143/130 = x/100 143 x 100 = 14,300 130 x 1 = 130 so we now have the fraction 14,300 over 130 which reduces to 110 over 1 which is actually just 110. So x = 110. Our percentage increase is 110.

3. Euler271

amount of change = (new amount - original amount)

4. Psymon

Well, only a 10% increase. Realize that 100% is the old amount of 130. So if youre going to increaseby 100% + 10%, bit much, eh?

5. Euler271

so, yes you've got the right "formula" but amt of change is (143-130) and not 143

6. danijo1814

sorry i was afk

7. danijo1814

so i solved for the wrong thing?

8. Euler271

pasting what you wrote: that is the question this is my answer: amount of change/original amount = percent of change/100 143/130 = x/100 amount of change is (new amount - original amount) = 143-130

9. danijo1814

i'm supposed to subtract them or what are you trying to say

10. Euler271

$\frac{ 143-130 }{ 130} = \frac{ x }{ 1000 }$

11. Euler271

x/100

12. danijo1814

13/130 = x/100?

13. Euler271

yes

14. danijo1814

so i would multiply across and add a 1 under 100, no?

15. danijo1814

and that would be 13k over 130

16. danijo1814

which reduces to 10 so my answer is 10 percent?

17. danijo1814

hey they left

18. kelliegirl33

(new value - old value) / old value (143 - 130) / 130 = 13/130 = .1 .1 x 100 = 10% your answer is correct...10% increase

19. danijo1814

thank you all for the help i got it now