Jakim procentem liczby a jest liczba b jeżeli . :
a) a=1600 ; b=80
a=800; b=120
a=120 ; b=60
a=80; b=8
a=420; b=70
a=500;b=125
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a) 100*80/1600=5%
b)100*120/800= 15%
c)100*60/120=50%
d)100*8/80=10%
e)100*70/420= 16,6666667%
f)100*125/500= 25%