:. 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?
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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.
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