Tony buys a television for $275 and sells it for a retail price of $500. What is the percent of markup? Round to the nearest TENTH of a percent

Percent increase is ~81.8%
To find the percent change from 275 to 500, subtract 275 from 500. You will have 225.
To find the percentage you set up a cross multiply equation

X. 225
—- X —-
100. 275

Then you will have
275x = 22500
Where x= 81.8~
Where 500 is ~181.8% of 275