Explicação passo-a-passo:
01)
a)
[tex]\sf{ \frac{2}{10} \times \frac{10}{10}\rightarrow \frac{2 \times 10}{10 \times 10} = \frac{20}{100} \rightarrow \: \boxed{\red{\mathsf{20\%}}} }[/tex]
b)
[tex]\sf{ \frac{1}{10} \times \frac{10}{10} \rightarrow \frac{1 \times 10}{10 \times 10} = \frac{10}{100} \rightarrow \: \boxed{\red{\mathsf{10\%}}}}[/tex]
c)
[tex]\sf{ \frac{4}{20} \times \frac{5}{5}\rightarrow \frac{4 \times 5}{20 \times 5} = \frac{20}{100} \rightarrow \:\boxed{\red{\mathsf{20\%}}} }[/tex]
ATT:ARMANDO
