Reverse Percentages

Question 1:

A house was sold for £340000, at a profit of 8%. Find the original amount.

£314815

Question 2:

A house was sold for £423000, at a loss of 30%. Find the original amount.

£604286

Question 3:

A car was sold for £31000, at a profit of 6%. Find the original amount.

£29245

Question 4:

A house was sold for £190000, at a loss of 30%. Find the original amount.

£271429