Question

represente as fraçoes abaixo na forma percentual
7/10
1/5
3/20
3/4
1/8.2​
É matemática rs

Answer 1

Resposta:

a) 70%

b)20%

c) 15%

d) 75%

e)12% ou 6%

Explicação:

Para transformar frações em porcentagem temos que primeiro achar a parte decimal da fração ou seja devemos dividir.

$7 \div 10 = 0.7$

depois vamos multiplicar por 100.

$0.7 \times 100 = 70\%$

vamos fazer isso em todas.

b)

$1 \div 5 = 0.2$

$0.2 \times 100 = 20\%$

c)

$</strong><strong>3</strong><strong> </strong><strong>\div </strong><strong>2</strong><strong>0</strong><strong> = 0.</strong><strong>1</strong><strong>5</strong><strong> </strong><strong>\times 100 </strong><strong>=</strong><strong> </strong><strong>1</strong><strong>5</strong><strong>\%</strong><strong> </strong><strong> </strong><strong>$

d)

$3 \div </strong><strong>4</strong><strong> </strong><strong>= 0.</strong><strong>7</strong><strong>5</strong><strong>\times 100 = </strong><strong>7</strong><strong>5</strong><strong>\%$

e)

$</strong><strong>1</strong><strong> </strong><strong>\div </strong><strong>8</strong><strong>.</strong><strong>2</strong><strong> = 0.</strong><strong>1</strong><strong>2</strong><strong>\times 100 = </strong><strong>1</strong><strong>2</strong><strong>\%$ ou $1 \div 8</strong><strong> </strong><strong>\</strong><strong>t</strong><strong>i</strong><strong>m</strong><strong>e</strong><strong>s</strong><strong> </strong><strong>2 = </strong><strong>1</strong><strong> </strong><strong>\</strong><strong>d</strong><strong>i</strong><strong>v</strong><strong> </strong><strong>1</strong><strong>6</strong><strong> = </strong><strong>0</strong><strong>,</strong><strong>0</strong><strong>6</strong><strong> </strong><strong> </strong><strong>\times 100 = </strong><strong>6</strong><strong>\%</strong><strong> </strong><strong>$