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140 - 49 = 91 zł
b) 2000 - 100%
240 = x%
x= 12 %
Odp. 91zł.
b) zł %
2000 - 100
X
2000-1740 - x
2000 x = 260 * 100
x = 260 * 100 / 2000 = 13
Odp. 13%.
B=w zaokrągleniu 15 %