West Bengal government has launched buses with air purifiers to reduce the pollution level in Kolkata city. West Bengal Pollution Control Board (WBPCB) has launched it with Bus Roof Mounted Air Purification System (BRMAPS). This is the first of its kind system in India named as 'Sudha Vayu'. 20 such buses have been launched. This is a part of a pilot project in collaboration with scientists from IIT Delhi.
What is the percentage change in the result when we add 25 to a certain number x, instead of subtracting 25 from the same number x?
What % of 115 is 23?
Two numbers are less than a third number by 25% and 34% respectively. Find the percent by which the second number is less than the first.
Suyash allocates 30% of his earnings for expenses and distributes the rest between his wife and two children—a daughter and a son—in a 2:5 ratio, re...
490 sweets were distributed equally among children in such a way that the number of sweets received by each child is 40% of the total number of children...
In a city, the number of persons travelling by bike is 80% the number of persons travelling by metro. The number of persons travelling on foot is 70% th...
If 75% of a number is added to 75, the result is the number itself, then the number is:
Sam started with 275 chocolates, and Jim had 35 chocolates more than Sam. Each consumed a portion of their chocolates—Sam ate 20% of his, and Jim ate ...
A salesman is allowed 12% commission on the total sales by him and a bonus of 1% on the sales over Rs. 10000. If the total earnings of a salesman is Rs....
A student multiplied a number by 2/5 instead of 5/2. What is the percentage error in the calculation?
