Question

alguém me ajuda pfvv eu preciso disso pra hoje eu colocaria mais pontos mas eu não tenho ​

Answer 1

Resposta:

0,75

0,5

0,85

0,8

Answer 2

$\sf \bullet \to A)\\\\\\\sf \displaystyle \frac{12}{16}\\\\\\\sf =\frac{4\cdot \:3}{16}\\\\\\\sf =\frac{4\cdot \:3}{4\cdot \:4}\\\\\\\to\boxed{\sf =\frac{3}{4}}\\\\\\\sf \bullet \to B)\\\\\\\sf \frac{15}{30}\\\\\\\sf =\frac{15\cdot \:1}{15\cdot \:2}\\\\\\\sf \to \boxed{\sf =\frac{1}{2}}\\\\\\\sf \bullet \to C)\\\\\\\frac{66}{77}\\\\\\\sf =\frac{11\cdot \:6}{77}\\\\\\\sf =\frac{11\cdot \:6}{11\cdot \:7}\\\\\\\sf \to \boxed{\sf =\frac{6}{7}\approx0,85714\cdots}$

$\sf \bullet \to D)\\\\\\\displaystyle \sf \frac{80}{100}\\\\\\\sf =\frac{20\cdot \:4}{100}\\\\\\\sf =\frac{20\cdot \:4}{20\cdot \:5}\\\\\\\to \boxed{\sf =\frac{4}{5}=0,8}$