Acamp stove that was $175.99 is now $155.99. what percent discount are you getting?

Lola says these two expressions have the same value. expression a expression b which explains whether lola is correct?

Mrs. avila is buying a wallpaper border to go on all of her kitchen walls. she wants to buy 5 extra feet of wallpaper border than she needs to be sure she has enough. she buys 55.5 feet of the border. the store owner selling the border uses the width of mrs. avila's kitchen to determine that the length of her kitchen must be 14.5 feet.

I’m still confused on how to work the percentages