oblicz, ile promili liczby b stanowi liczba a, jeżeli:
a) a=15, b=1000
b) a=15, b=2000
c) a=3, b=3000
d) a=1, b=800
e) a=2, b=400
f) a=6, b=800
g) a=120, b=2000
h) a=180, b=1000
i) a=15, b=140
j) a=20, b=4500
k) a=18, b=9000
l) a=2,3, b=850
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a]=15/1000=15%₀
B]=15/2000=7,5/1000=7,5%₀
c]=3/3000=15₀
d]=1/800=1,25/1000=1,25%₀
e]=2/400=5/1000=5%₀
f]=6/800=7,5/1000=7,5%₀
g]=120/2000=60/1000=60%₀
h]=180/1000=180%₀
i]=15/140=15 000/140=107¹/₇%₀
j]=20/4500=20 000/4500=4⁴/₉%₀
k]=18/9000=18 000/9000=2%₀
l]=2,3/850=2300/850=2¹²/₁₇%₀