Question

Quanto vale 1% de 1200?​

Answer 1

$\sf 1\%\:1200\\\\\\\dfrac{1}{100}\cdot \:1200\\\\\\{Fatore\:o\:número:\:}\:\to1200=100\cdot \:1\\\\\\=\dfrac{1}{100}\cdot \:100\cdot \:12\\\\\\{Agora\:Faça\:o\:cancelamento\:cruzado\:do\:fator\:comum:}\:100\\\\\\=1\cdot \:12\\\\\\{Aplique\:a\:regra}\:a\cdot 1=a\\\\\\\to\boxed{\sf =12}$