1.Liczba 65 jest o 25% mniejsza od liczby a. Oblicz a.
2.Oblicz liczbe której 7.5%stanowi 3
zad 1
65 = 0,75a
a = 65/0,75 = ok 86,67
zad 2
7,5% = 3
100% = x
x = 100*3/7,5 = 40
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zad 1
65 = 0,75a
a = 65/0,75 = ok 86,67
zad 2
7,5% = 3
100% = x
x = 100*3/7,5 = 40