Can someone please help me

Isee the amount was $90.00 then reduced to $75.00 , what is the percent ?

The standard distance between studs in a house is 1.5 feet. if you have a set of blueprints for a house that mark every 1.5 feet with 2 in., by how many inches will a 13-foot wall be represented?

Lydia collected two sets of data one set of data shows an outlier. which set has an outlier, and which number is the outlier?