Jak obliczyć 20% więcej niż 400?
400:10=40 - 10%
40razy2=80 - 20%
400+80=480 - o 20% więcej
400:20
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400:10=40 - 10%
40razy2=80 - 20%
400+80=480 - o 20% więcej
400:20