Question

:. If the value of any number is increased by 20%
and 30% and then decreased again 50% then
find how much % less then original number?​

Answer 1

Step-by-step explanation:

Let the number be x.

ATQ;

x + 20 % of x

x + 1/5 of x

x + x/5

6x/5

6x/5 + 30 % of 6x/5

6x/5 + 3/10 × 6x/5

6x/5 + 18x/50

78x/50

78x/50 - 50 % of 78x/50

78x/50 - 78x/100

78x/100

(x - 78x/100 ×100)%

-77×%

the new number is 77% less than the original number.