Aisjsiojsiosdjsdoijsoijdoij

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?

What is the solution to the equation in the & show work i’m very

Jada has a meal in a restaurant she adds up the prices listed on the menu for everything they ordered and gets a subtotal of $42.00. when the check comes, it says they also need to pay $3.99 in sales tax. what percentage of the subtotal is the sales tax