Respuesta :

10 % of 700 = 70
so 20% of 700 = (70 x 2 ) = 140
5 % of 700 = (70 / 2 ) = 35
1% of 700 = (35 / 5 ) = 7
7 x 6 = 42
700 - 182 = 518.
selling price is £518.