Liczba a stanowi 40% liczby b. ILe procent liczby a stanowi liczba b?
DAM naj;-)
a=0,4b |:0,4
b=a/0,4
b=10/4a
b=5/2a
b=2,5a ⇒ 250%
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a=0,4b |:0,4
b=a/0,4
b=10/4a
b=5/2a
b=2,5a ⇒ 250%