If a exceeds b by x%, then which one of the following equations is correct ?

If the height of a cylinder is increased by 15% and the radius of its base is decreased by 10% then the percentage chang…

In an examination 36% are pass marks. If an examine gets 17 marks and fails by 10 marks, what are the maximum marks?

A line of length 1.5 metres was measured as 1.55 metres by mistakes. What will be the value of error percent ?

Connie has a number of gold bars, all of different weights. She gives the 24 lightest bars, which weigh 45% of the total…

Three candidates contested an election and received 1136, 7636 and 11628 votes respectively. What percentage of the tota…

In an examination A got 25% marks more than B, B got 10% less than C and C got 25% more than D. If D got 320 marks out o…

If a number is reduced by 40% it becomes two-thirds of another number. What is the ratio of the first number to the seco…