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b
45*100:3=4500:3=1500
c
210*100:3=21000:3=7000
d
225*100:3=22500:3=7500
30-3%
x= 300*100/(:3)
x=10000zł
b)x-100%
45-3%
x=100*45/3
x=1500zl
c) x-100%
210-3%
x=100*210/3
x=7000zł
d) x-100%
225-3%
x=225*100/3
x=7500zł