Answer:
100%
Step-by-step explanation:
Let the normal retail price of the sweater be 'SP' and the cost price be 'CP'
Therefore,
The selling price = SP - 40% of SP = SP - 0.4SP = 0.6SP
Now,
the profit = 20% of CP = 0.2CP
also,
Profit = Selling Price - Actual price
or
0.2CP = 0.6SP - CP
or
1.2CP = 0.6SP
Or
CP = 0.5SP
or
SP = 2CP
thus,
Increase percentage in sweater marked up from wholesale at its normal retail price
=

or
=

= 100%