Question

Quanto é 30,% de 1.300​

Answer 1

390

1300x30=39000

39000\100= 390

Answer 2

$30\%\:de\:1.300\\ \\ \frac{30}{100}\cdot \:1300\\ \mathrm{Converter\:para\:fracao}:\quad \:1300=\frac{1300}{1}\\ =\frac{30}{100}\cdot \frac{1300}{1}\\ \frac{30}{1}\cdot \frac{13}{1}\\ \mathrm{Multiplicar\:fracoes}:\quad \frac{a}{b}\cdot \frac{c}{d}=\frac{a\:\cdot \:c}{b\:\cdot \:d}\\ =\frac{30\cdot \:13}{1\cdot \:1}\\ \mathrm{Multiplicar\:os\:numeros:}\:30\cdot \:13=390\\ =\frac{390}{1}\\ \mathrm{Aplicar\:a\:regra}\:\frac{a}{1}=a\\ 30\%\:de\:1300=390$

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