Subject
Quantitative Aptitude
Topic
Percentage
A number is increased by 20% and then decreased by 20%, the final value of the number is ?
A number is increased by 20% and then decreased by 20%, the final value of the number is ?
ক)
increase by 2%খ)
decrease by 3%গ)
decrease by 4%ঘ)
increase by 5%Explanation
Here, x = 20 and y = - 20 Therefore, the net % change in value =% = % or - 4% Since the sign is negative, there is a decrease in value by 4%.Related questions
The true discount on a bill of Tk. 540 is Tk. The banker's discount is:The present worth of a sum due sometime hence is Tk. 576 and the banker's gain is Tk. The true discount is:In a class, 120 students are male and 100 students are female 25% of the male students and 20% of the female students are engineering students. 20% of the male engineering students and 25% of the female engineering students passed the final exam, what percentage of engineering students passed the exam?Tk. 20 is the true discount on Tk. 260 due after a certain time. What will be the true discount on the same sum due after half of the former time, the rate of interest being the same?if 75% of a number is added to then the result is the number itself . The some of the number isThe present worth of Tk. 2310 due 2×(1/2) years hence, the rate of interest being 15% per annum, is:The banker's gain on a bill due 1 year hence at 12% per annum is Tk. The true discount is:A sum of money invested at compound interest amounts to Rs 4624 in 2 yrs and Rs 4913 in 3 yrs. The sum of money is