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48 - 20%*48 =
= 48 - 0,2* 48=
= 48 - 9,6=
= 38,4
38,4
-------- * 100% =
240
""" 3840 %
= ------------- =
""" 240
= 16%
Odp. Otrzymany wynik stanowi 16% liczby 240.
zad 2.
30% * (x + 30%x) =
= 0,3 * (x + 0,3x)=
= 0,3 * 1,3x=
= 0,39 x
Odp. Szukana liczba to 0,39x.