I see that the amount i owe has been reduced from $90.00 to $75.00."

Answer:

The debt was lowered by 16.6%.

Step-by-step reasoning:

Reducing your debt from $90 to $75 equates to a $15 discount.

This reduction can be expressed as a percentage in two ways:

Let x be the percentage value.

1) Using a proportion:

90 corresponds to 100%

15 corresponds to x%

Calculating x yields: (15 × 100) / 90 = 16.6%

2) By division:

Dividing $15 by $90 gives 0.166

Multiplying by 100 converts it to a percentage: 0.166 × 100 = 16.6%

Hence, your debt decreased by 16.6%.