The dashed triangle is a dilation image of the solid triangle with the center at the origin. is the dilation an enlargement or a reduction? find the scale factor of the dilation.

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.