Hello!!! Can someone help me me plss I just need this one question

Which of these people has balanced their checkbook correctly? oa. gary: the balance in his check register is $500 and the balance in his bank statement is $500. b. gail: the balance in her check register is $400 and the balance in her bank statement is $500. c. gavin: the balance in his check register is $500 and the balance in his bank statement is $510.

A50% increase followed by 33 1/2% decrease

Can someone answer this question for me