Question

The price of a desktop computer decreases from $1560 to $1220. Find the percentage decrease in its price.

Answer 1

$\huge\bold{\red{Solution:-}}$

$\sf\underline{\blue{\:\:\:\:\:Given:-\:\:\:\:\:\:}}$

$\sf\bullet Actual\:price\:of\: computer= 1560\\ \\ \sf\bullet New\: Price=1220$

• We have to calculate how may percent does the price of computer be decreased

Now

$\boxed{\sf{Percentage\: decrease=\dfrac{Change\: price}{Actual\:price}\times 100\%}}$

• So

$\sf\implies Change\:in\: Price=1560-1220\\ \\ \sf\implies 340\\ \\ \sf\:\:\:\:{\purple{Now\:the\: decrease\:\%}}\\ \\ \sf\implies Decreased\:\%=\dfrac{change\:in\: price}{Actual\:price}\times 100\%\\ \\ \sf\implies Decreased\%=\dfrac{340}{156\cancel{0}}\times 10\cancel{0}\%\\ \\ \sf\implies Decreased\%=\cancel{\dfrac{340}{156}}\times 10\%\\ \\ \sf\implies Decreased\%= 2.17\times 10\%\\ \\ \sf\implies Decreased\%= 21.7\%$

$\boxed{\dag{\sf{Percentage\: Decrease\:in\: Price=21.7\%}}}$

Answer 2

$\large \underline{ \pink{ \boxed{ \bf \red{Quick \: Answer}}}}$