A number is increased by 20% and then it is decreased by 30%

1.	A number is increased by 20% and then it is decreased by 30%
Answer» Answer: MARK MY ANS AS BRAINLIEST STEP-by-step explanation: The answer is 4% . Let the number be x. 1st step : It is increasedd by 20% . Amount if increase = (20/100)x THerefore,the number now after increase = Previous value+amount increased =x+(20/100)x =(120/100) x 2nd step: The resultant number is again DECREASED by 20% . Amount decreased= (20/100)(120/100)x = 24x/100 The number now = (120/100) x- (24/100)x =96x/100 Now the original number was x and now it is 96x/100. so net decrease = x-96x/100 Percentage decrease =(net decrease/ original value) 100 =4%

Answer»

Answer:

MARK MY ANS AS BRAINLIEST

STEP-by-step explanation:

The answer is 4% .

Let the number be x.

1st step : It is increasedd by 20% .

Amount if increase = (20/100)*x

THerefore,the number now after increase = Previous value+amount increased

=x+(20/100)*x =(120/100) *x

2nd step: The resultant number is again DECREASED by 20% .

Amount decreased= (20/100)*(120/100)*x = 24x/100

The number now = (120/100) x- (24/100)x =96x/100

Now the original number was x and now it is 96x/100.

so net decrease = x-96x/100

Percentage decrease =(net decrease/ original value)* 100

=4%

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