Answer:
250%
Step-by-step explanation:
Let initial Markup % = x
Sales price = 100% + x = (1 + x)%
50% off sale = (1+x)% - (1+x)% /2
Final price after 50% off sale = 1 + 0.75 = 1.75
Hence,
50% off sale = 75% price markup
0.5(1 + x) = 1.75
0.5 + 0.5x = 1.75
0.5x = 1.75 - 0.5
x = 1.25 / 0.5
x = 2.5
Hence, Markup on initial price should be 1.25 = (2.5 * 100%) = 250%
