Answer: Take 1/3 off the original price (top left corner)
Step-by-step explanation:
1/3 = 0.333 = 33.3% approximately
Taking 1/3 off the price is the same as an approximate discount of 33.3%
This is larger than 25%, so this rules out the bottom left corner. The top right corner is incorrect because we have a 20% discount here and 33.3% is larger than that as well (note: 80% + 20% = 100%). The bottom right corner is incorrect because it doesnt matter what the original price is.