Question

300-10%=?
160-10%=?
45-10%=?

Answer 1

300-10% = 300-(300/100%)*10%  = 300-30= 270
160-10%= 160-(160/100%)*10% = 160-16 = 144
45-10% = 45 - (45/100%)*10% = 45 - 4,5 = 40,5

Answer 2

300-0,1*300=300-30=270
160-0,1*160=160-16=144
45-0,1*45=45-4,5=40,5