What is the percentage decrease- a number reduces from 70 to 42-10-25-35-40-

Question

Toppr Admin · Accepted Answer

-x21D2-xA0- A number reduces from 70 to 42-x21D2-xA0- Decrease in number - 70-x2212-42-28-x21D2-xA0- Decrease - - -DecreaseinnumberOriginalnumber-xD7-100-x21D2-xA0- Decrease - - -2870-xD7-100-280070-40-

Class	15 $-$ 20	20 $-$ 25	25 $-$ 30	30 $-$ 35	35 $-$ 40	40 $-$ 45
Percentage	42	38	35	26	16	05

What is the percentage decrease, if a number reduces from $70$ to $42$ ?
$10 %$
$25 %$
$35 %$
$40 %$

$\Rightarrow$ A number reduces from $70$ to $42$ .
$\Rightarrow$ Decrease in number = $70 - 42 = 28$

$\Rightarrow$ Decrease % = $[\frac{D e c r e a s e i n n u m b e r}{O r i g i n a l n u m b e r} \times 100] %$

$\Rightarrow$ Decrease % = $[\frac{28}{70} \times 100] % = \frac{2800}{70} = 40 %$

What is the percentage decrease, if a number reduces from 70 to 42?10%25%35%40%

⇒ A number reduces from 70 to 42.⇒ Decrease in number = 70−42=28⇒ Decrease % = [DecreaseinnumberOriginalnumber×100]%⇒ Decrease % = [2870×100]%=280070=40%

What is the percentage decrease, if a number reduces from $70$ to $42$ ?
$10 %$
$25 %$
$35 %$
$40 %$

$\Rightarrow$ A number reduces from $70$ to $42$ .
$\Rightarrow$ Decrease in number = $70 - 42 = 28$

$\Rightarrow$ Decrease % = $[\frac{D e c r e a s e i n n u m b e r}{O r i g i n a l n u m b e r} \times 100] %$

$\Rightarrow$ Decrease % = $[\frac{28}{70} \times 100] % = \frac{2800}{70} = 40 %$