Problem at the Bank

 

A bank customer had £100 in his account.

He then made 6 withdrawals, totaling £100.

He kept a record of these withdrawals, and the balance remaining in the account, as follows:

Withdrawals Balance left
£50 £50
£25 £25
£10 £15
£8 £7
£5 £2
£2 £0


£100 £99

Why are the Totals not exactly right?


 

Puzzle supplied by Richard Rider
 
 

Stuck?! Read The Solution