Respuesta :

cecylya

Answer:

The rate of discount of a lawnmower is 37,5%

Step-by-step explanation:

Sale price formula is

S = p - rp

where S = sale price,

r = discount percentage rate

p = the original price.

Isolating r

r= (p-S)/p

r=  ($168- $105)/$168

r=0.375

r= 37,5%