Mathilda is determined to pay back the money she owes a friend so she decides to pay an initial installment of $125. If she still has 75% left to pay, how much did she owe originally?
Percentage means per 100, so if she still owes 75%, she must have paid 100% - 75% = 25% of the original amount.
25% of the original amount = (25/100)*original amount = $125
Multiplying both sides by (100/25) gives: original amount = (100/25)*$125 = $<<(100/25)*125=500>>500
#### 500
Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
You are solving math problems. Here are some examples of how to solve the task:

Boris has 24 books and he donates a fourth of his books to the library. Cameron has 30 books and he donates a third of his books to the library. After donating their books, how many books in total do Boris and Cameron have together?Boris donates 24 / 4 = <<24/4=6>>6 books
Then Boris has a total of 24 - 6 = <<24-6=18>>18 books
Cameron donates 30 / 3 = <<30/3=10>>10 books
Then Cameron has a total of 30 - 10 = <<30-10=20>>20 books
Altogether, Boris and Cameron have 18 + 20 = <<18+20=38>>38 books
#### 38[END]

At the bake sale, Tamara makes $32 from the brownies. She made 2 pans of brownies which were all sold.  The brownies were cut into 8 big square pieces.  How much did each brownie cost?Tamara had 2 x 8 = <<2*8=16>>16 big square brownie pieces.
Each brownie piece cost $32 / 16 = $<<32/16=2>>2.
#### 2[END]

Now, solve this next question in the style of the above examples:

Mathilda is determined to pay back the money she owes a friend so she decides to pay an initial installment of $125. If she still has 75% left to pay, how much did she owe originally?

### Response:
Percentage means per 100, so if she still owes 75%, she must have paid 100% - 75% = 25% of the original amount.
25% of the original amount = (25/100)*original amount = $125
Multiplying both sides by (100/25) gives: original amount = (100/25)*$125 = $<<(100/25)*125=500>>500
#### 500