Respuesta :

Initial amount:  s.
Then, after having spent 7% of his savings, the amount left is 0.93s = £771.90.

Dividing both sides by 0.93, we get s = 
£830.

Check:  What is 7% of 
£830?  0.07(£830) = £58.1.  If we subtract that from £830, do we get £771.90?  Try it.
okay so you can put 7%of $771.90 and you multiply that and you get answer but you cant put 7% on a calculator so you have to put it into a decimal like 0.7 and you get the answer is 540.33$ i hope that help you