Question

A no. is decreased by 10% and the resulting no. is again decreased by 20% what is the final % of decrease?​

Answer 1

let the no be x

now, according to question.

first no obtained = x-10%

then, 20%-(x-10%)

Answer 2

Answer:

25/700%

Step-by-step explanation:

Let no. be X

First Decrease percent = 10

new no. 90/100*X     (this is=X-10/100)

9 X/10

Again Decreased by 20 %

So, (80/100)*(9 X/10)

=18 X /25

Now to Get total Decrease we have to subtract 18 X/25 from X

X- 18 X/25

7 X/25

Now We have to find out 7 X/25 is how many percent of X

Let's Start

(7 X/25)/100* X

7 X/25=100 X

25=700 X

X= 25/700

Hope it helped you

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