Reverse Percentages

Question 1:

A house was sold for £340000, at a profit of 31%. Find the original amount.

£259542

Question 2:

A car was sold for £28000, at a profit of 13%. Find the original amount.

£24779

Question 3:

A house was sold for £149000, at a profit of 16%. Find the original amount.

£128448

Question 4:

A house was sold for £433000, at a profit of 31%. Find the original amount.

£330534