A single discount equivalent to a discount series of 20%, 10%, and 25% is

A single discount equivalent to a discount series of 20%, 10%, and 25% can be calculated as follows:

Let's say the original price of an item is $100.

First, apply a 20% discount to get $100 - (20/100) * $100 = $80.

Then, apply a 10% discount to the discounted price of $80: $80 - (10/100) * $80 = $72.

Finally, apply a 25% discount to the second discounted price of $72: $72 - (25/100) * $72 = $54.

Therefore, a single discount equivalent to a discount series of 20%, 10%, and 25% is $54.