27/50 = 54/100= 0,54

\(\frac{27}{50}=\frac{27}{50}.2=\frac{34}{100}\) .( dấu chấm là dấu nhân nha )

\(\frac{1}{4}=\frac{25}{100}=0,25\)

\(\frac{1}{4}\)

\(=\frac{1\times25}{4\times25}\)

\(=\frac{25}{100}\)

\(=25:100\)

\(=0,25\)

\(\frac{116}{125}=\frac{928}{1000}=0,928\)

\(\frac{116}{125}=\frac{116.8}{125.8}=\frac{928}{1000}=0,928\)

\(\frac{3582}{10000}=0,3582\)

\(\frac{6625}{10}=662,5\)

3582/10000=0,3582

6625/10=6,625

\(\frac{5}{4}=\frac{125}{100}=1,25\)

\(\frac54\) = \(\) 1,25

\(\frac37\) = 0,4285

Câu 1:

\(\frac{85}{10} = 8.5\)
(Vì 85 ÷ 10 = 8.5)

Câu 2:

\(\frac{238}{100} = 2.38\)
(Vì 238 ÷ 100 = 2.38)

câu 1 : 8,5

câu 2 : 2,38

\(2011\frac{1}{10}=2011+0,1=2011,1\)

2011,1

\(\frac{14}{70}\) = \(\frac{2}{10}\) 

\(\frac{75}{300}\) = \(\frac{25}{100}\)

\(\frac{14}{70}=0,2\)

\(\frac{75}{300}=0,25\)

< Chúc bn hok tốt >

đáp án B

B.3/100

\(\frac{60}{80}=\frac{3}{4}=\frac{3\text{ }\times25}{4\times25}=\frac{75}{100}\)

\(\frac{15}{60}=\frac{1}{4}=\frac{1\times25}{4\times25}=\frac{25}{100}\)

\(\frac{60}{80}=\frac{3}{4}=\frac{3\times25}{4\times25}=\frac{75}{100}\)

\(\frac{15}{60}=\frac{1}{4}=\frac{1\times25}{4\times25}=\frac{25}{100}\)