Question

the sum of number when a number is increase by 10 %and decreased by 10% is 100 .what is the number

Answer 1

let the no x,
the sum of number when a number is increase by 10 %and decreased is = (90/100)x + (110/100)x = 2x
in the question the sum is 100
therefore 2x=100
x= 50

Answer 2

Step-by-step explanation:

Answer:

10% Increase

10% Decrease

• According to the Question :

⇢ Number = No. × (100+Inc)% × (100-Dec)%

⇢ Number = 100 × (100 + 10)% × (100 - 10)%

⇢ Number = 100 × 110% × 90%

⇢ Number = 100 × 110/100 × 90/100

⇢ Number = 11 × 9

⇢ Number = 99

∴ Hence, the new number will be 99.