Bài 3.1
a, $\frac{1}{2}=\frac{50}{100}$=50%
b, $\frac{3}{5}=\frac{60}{100}$=60%
$c, \frac{36}{200}=\frac{18}{100}$=18%
$a, \frac{84}{300}=\frac{28}{100}$=28%
Bài 4
a, 5%=$\frac{5}{100}$=$\frac{1}{20}$
b, 10%=$\frac{10}{100}=\frac{1}{10}$
c, 15%=$\frac{15}{100}=\frac{3}{20}$
c, 30%=$\frac{30}{100}=\frac{3}{10}$
Bài 1
$a, 0,37$=37%
$b, 0,2324$=23,24%
$c, 1,282$=128,2%
Bài 2
$a, 8:40=\frac{8×100}{40}$=20%
$b, 40:8=\frac{40×100}{8}$=500%
$b, 9,25:25=\frac{9,25×100}{25}$=37%
Bài 3.2
$17:18=0,9444....$=94,44%
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