Lauren had $80 in her savings account.

Question

Lauren had $80 in her savings account. When she received her paycheck, she made a deposit which brought the balance up to $120. By what percentage did the total amount in her account increase as a result of this deposit?

Answer 1

The account increased by $40 (120 new balance, less 80 original balance).  The $40 increase represents 50% of the original $80 (80 / 40).