Q. Two number is first increased by 10 % and then reduced by 10 % the number:__________?
a. 2:5
b. 4:5
c. 6:7
d. 3:5
Let the third number be x.
Then 1st number = 120% of x = (120/100 × x) = 6x/5
2nd number = 150 % of x = (150/100 × x) = 3x/2
Ratio of these numbers = 6x/5 : 3x/2 = 12: 15 = 4 : 5