Respuesta :

£2.700 - £1890 = £810

£ (money) -------------- percentage (%)
2.700 -------------------- 100
810 ----------------------- x

2700*x = 810*100
2700x = 81000
[tex]x = \frac{81000}{2700} [/tex]
[tex]\boxed{x = 30}[/tex]

Answer: 
Percentage loss = 30%