# Time + percentages - examples

Our percentage calculator will help you quickly calculate various typical tasks with percentages.- Server

Calculate how many average minutes a year is the web server is unavailable, the availability is 99.99%. - Christmas

Calculate how much of the school year (202 days long) take Christmas holidays 16 days long. Expressed as a decimal number and as a percentage. - Greek railwayman

Rafael works for the Slovak railways since 1987. His salary is 874 €. His colleague, Asterios works in the Greek State Railways from 2001. Earns 5670 € per month. Calculate how many times earns Asterios more than Asterios? - Bulbs

The probability that the bulb can operate 4000 hours is 0.13. What is the probability that exactly one of eight bulbs can operate 4000 hours? - Deposit 3

After a year had Martin on bank account € 1764. What was the interest rate when the initial deposit was € 1581? - Millionaire

Mr. Smith have gone withdraw from bank saving interest € 1,500. How big was his initial deposit if the annual interest rate is 1.5%? - Simple interest 2

Find the simple interest if 2531 USD at 2.5% for 9 months. - TV fail

The TV has after 10,000 hours average 35 failures. Determine the probability of TV failure after 500 hours of operation. - Crystal

Crystal grows every month 2.9 promile of its mass. For how many months to grow a crystal from weight 310 g to 482 g? - Simple interest 4

Find the simple interest if 19590 USD at 4.6% for 242 days. Assume a 360-day year. - Work

Workers works 5 days a week and has 38 days of vacation a year. Calculate how many days is out of work and express it as a percentage. Consider that a year has 52 weeks. - Apartments

Apartment on the first floor was 10% more expensive than the same apartment on the second floor. The difference was 105 Kc annually. Calculate the annual rent of the apartment in the first floor and from apartment on the second floor. - Interst on savings

The bank offers 1.6% interest. How many euros have to insert at the beginning if we received € 15 on the interest? - Principal and interest

Peter put € 270 principal into bank and at the end of the year on account was € 282. To what annual interest rate that Peter had deposited money in the bank? - Unions

Calculate how much money per year would go to the treasury of unions if 447 thousand employee join unions with an average net salary of 539 euros and if memberhip in union cost 1% of the net monthly salary. - Car value

The car loses value 15% every year. Determine a time (in years) when the price will be halved. - The deposit

Deposit has been placed for one year at an annual rate of 4.5%. After the added interst amount rose to € 2,612.5. Determine initial deposit. - Interest p.a.

Calculate the value of interest in period of 1 year from the deposit 62000 CZK at 8 percent interest rate, after deducting 15 percent tax. - Job task

After two hours and 40 minutes the job is finished. Compared to last year we were 40 minutes faster. What is the percentage increase to our performance? - Population

The town has 159,000 inhabitants. 40 years ago there were 185,000. How many people will live in town in 10 years if the average rate in population is as in previous years?

Do you have interesting mathematical example that you can't solve it? Enter it and we can try to solve it.