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Answer the question in the image

Answer the question in the image-example-1
User P Burke
by
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1 Answer

6 votes
Answer: The percentage of decrease is: " 33 ⅓ %" .
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Step-by-step explanation:
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Given:
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10 years ago, # of illiterate people = 150 lakhs;

"Now" ; # of illiterate people = 100 lakhs ;
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So; the decrease in the # of illiterate people = "(150 - 100) = 50 lakhs ;
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To calculate the "percentage of decrease" :
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The "percentage of decrease" =

{"decrease in the # of illiterate people"} / {"# of illiterate people started with"] ;

× 100 (percent).
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=
(50)/(150) * 100 % ;

{Note that:
(50)/(150) =
(5)/(15) ;
→ The "zeros" cancel out ;


(50)/(150) * 100 % ;

=
(5)/(15) * 100 ;

Note:
(5)/(15) =
((5/5))/((15/5)) ;
=
(1)/(3) ;
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(1)/(3) * 100 =
(1)/(3) *
(100)/(1) ;
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=
((1*100))/((3*1)) % ;

=
((100))/((3)) % ;

= "(100 ÷ 3) % ;

= " 33 ⅓ % " .
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Answer: The percentage of decrease is: " 33 ⅓ %" .
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User Jacob K
by
6.8k points