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2. 54
3. 202
4. 0,6
5. 30
54
202
60
30
25% liczby 216 = 25/100 * 216 = 54
50% liczby 404 = 50/100 * 404 = 202
10% tej liczby to 6
10%x = 6
10/100x = 6
x = 6 / 10/100
x = 6 * 10
x = 60
75% liczby 40 = 75/100 = 30