zadanie 1
a)
2100-1200/1200=900/1200=9/12=3/4=0,75=75%
b)
1200-2100/2100=-900/2100=-0,4286=-42,86%
c)
1280-1200/1200=0,0(6)=6,(6)%
d)
1200-1280/1280=-80/1280=-0,0625=-6,25%
zadanie 2
cena brutto = cena netto + podatek VAT
a)
400*122%
b)
107%-8400
100%-x
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107x=8400*100
107x=840000//:107
x=
c)
brutto-netto=VAT
12,36-12=0,36
i znów proporcje:
100%-12
x-0,36
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12x=0,36*100
12x=36
x=3