Help please. It’s due tomorrow and I have in person class and I actually don’t understand. (It’s ok if not)

I would’ve worked it out but it’s been years

Step-by-step explanation:

Regular selling price (price before discount) 100%.

Price after trade discount of 15% is 85% of regular selling price..

Price after trade discount reduced to 10% is 90% of regular selling price.

By reducing the trade discount from 15% to 10% meant increasing the selling price by 5% of the selling price before applying the trade discount.