By decreasing each dimension by 1 unit, the area of a rectangle decreased from 20 square feet (on the left) to 12 square feet (on the right). find the percent decrease in area.

This is what i found “an explicit formula designates the nth term of the sequence, as an expression of n (where n = the term's location). it defines the sequence as a formula in terms of n. this example is an arithmetic sequence(the same number, 5, is added to each term to get to the next term).” i hope this you for what your looking for. can you plz mark me brainliest?