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Sagot :

Salut !

1) 75 kg × 2/100 = 1,5 kg

2) x kg × 2/100 = 1,8 kg ⇒ x = 1,8 ÷ 2/100 = 90 kg

3) 2/100 = (2×1)/(2×50) = 1/50

4) oui car 20/100 = (20×1)/(20×5) = 1/5

5) 90/170 = 9/17  correspond à 9/17 × 100 ≅ 52,94 %

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