8. Price of a commodity decreased by 10℅ last year and increased by 20℅ this year. Find the percentage change in two years .
Answers
Answered by
13
% change = a + b + ab / 100
for increase take value +ve , for decrease take it -ve
let , a = 20, b = - 10
% change
= 20 + ( - 10 ) + ( 20 ) ( - 10) / 100
= 20 - 10 - 200/ 100
= 20 - 10 - 2
= 20 - 12 = 8 %
hence , the percentage change in two years = 8%
【 hope it helps 】
for increase take value +ve , for decrease take it -ve
let , a = 20, b = - 10
% change
= 20 + ( - 10 ) + ( 20 ) ( - 10) / 100
= 20 - 10 - 200/ 100
= 20 - 10 - 2
= 20 - 12 = 8 %
hence , the percentage change in two years = 8%
【 hope it helps 】
priyanshu674:
bro can u use only one variable
no , there is different value 10% and 20% so we canot do so ,or further ,its a formula for effective % age. but yes you can use variable like a and a1 etc.
okk
you can write formula as , a + a1 + aa1 / 100
take a = 20 or a1 = - 10
then result also will be the same
which formula i used in answer is good , you can learn it easily , and can use it , even % change in triangle , circle area ,,,, every where
tnx
wc
Answered by
6
Answer:
answer in the attachment
Attachments:
Similar questions