Odpowiedź:
62% 96
100% x
62x = 96 * 100
x = [tex]\frac{96 * 100}{62}[/tex]
x = [tex]\frac{96 * 50}{31}[/tex]
x = [tex]\frac{4800}{31}[/tex]
x ≈ 155
-------------------
100% 90
x 74
90x = 74 * 100
x = [tex]\frac{74 * 100}{90}[/tex]
x = [tex]\frac{74*10}{9}[/tex]
x =[tex]\frac{740}{9}[/tex]
x ≈ 82%
-------------------
100% 75
89% x
100x = 75 * 89
x = [tex]\frac{75 * 89}{100}[/tex]
x = [tex]\frac{15*89}{20}[/tex]
x = [tex]\frac{3 * 89}{4}[/tex]
x =[tex]\frac{267}{4}[/tex]
x = 67
