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எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்

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4. Conversion of ratio into percent
 
We can convert ratio into a percentage using the following method.
Example:
(i) \(a:b\)
 
=ab=[ab×100]%
  
(ii) \(3:8\)
 
=38=[38×100]%=3712%
 
5. Conversion of Percent into decimal
To convert the percent to decimal, first change it to a fraction by dividing it by \(1000\) and remove the \(\%\) sign. Then put the decimal point accordingly.
\(a\%\)           \(= a/100\)        \(= 0.0a\)
(percent)     (fraction)       (decimal)
Example:
(i) 37\(\%\)
 
\(=\) 37100
 
\(=\) 0.37\(\%\)
  
(ii) 49\(\%\)
 
\(=\) 49100
 
\(=\) 0.49\(\%\)
  
(iii) 28%
 
\(=\) 28 ·100
 
\(=\) 0.003\(\%\)
6. Conversion of decimal into a Percent
To convert decimal into a percent, first, change it to fraction for the removal of decimal and then multiply it by \(100\) and put the \(\%\) sign.
Example:
(i) 5.8
 
\(=\) 5810 
 
\(=\) [5810×100]%
 
\(=\) 580\(\%\)
  
(ii) 0.042
 
\(=\) 421000
 
\(=\) 421000 ·100
 
\(=\) 4.2\(\%\)