The price of a fan is $15. the price is 27% lower than last week.

what was the price of the fan last week?

round your answer to the nearest cent.

$20.55

(price last week) - 27% × (price last week) = $15 . . . . what the problem says

(price last week) × (1 - 0.27) = $15 . . . . factor out price

(price last week) = $15/0.73  . . . . . . . . . divide by the coefficient of price

(price last week) ≈ $20.55

a - base

b - exponent

so,