Answer:
The answer is 60% (the exact number is 60.1202405%)
Step-by-step explanation:
Using formula: purchase price minus selling divided by purchase then multiply by 100
60%
price - cost / cost = markup
799 - 499 = 300 / 499 = 0.601
or 60%
answer is first option
wherein, a = 1, b = -3, c = -5