10% de 40 =
10/100 de 40 =
40 ÷ 100 × 10 = 4 reais
5% de 40 =
5/100 de 40 =
40 ÷ 100 × 5 = 2 reais
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10% de 40 =
10/100 de 40 =
40 ÷ 100 × 10 = 4 reais
5% de 40 =
5/100 de 40 =
40 ÷ 100 × 5 = 2 reais