Help with percentages?

Question

I need some help with the math on this.

Say I quote a client $550 for a job. After doing a site visit, I get a better idea of the costs, and give a new estimate that is $800.

How do I calculate the % of how much the price increased?

Answer 1

the original price is = 550

new value = 800

difference = 800 - 550  = 250  

so the increased % = (250/550) *100 = 45.4545 % increased

= [amount increased / old value ]*100

= 45.45 % answer

good luck  

Answer 2

Increase / original * 100%

250/800 * 100%

Answer 3

From the formula in ratio and proportion...

Get their difference...

800 - 550 = 250...

500 : 100 = 250 : x

550 / 100 = 250 / x

55 / 10 = 250 / x

55x = 2500

x = 45. 45

.: the percentage is 45. 45%

Answer 4

(new - original)/original x 100%

($800 - $550)/$550 x 100%

= $250/$550 x 100%

= $25000/$550 %

= $500/$11 %

= 45 5/11 % (≈ 45.45%)