In 2013/14, there were 2,678 school children in year 6 in Nottingham. 624 of these children were classed as obese.
out of
What percentage of the total number of year 6 children in Nottingham are obese?
(Give your answer to the nearest whole number.)

Me. i can't figure out this question. give an explanation too. .

Ascientist places 24 cells in a petri dish. she knows the cells grow at an exponential rate, doubling in number every hour. how long will it take (in hours) for there to be 1100 cells in the dish? time to 1100 cells: 5.51832530 hours how long will it take to reach 110 cells? time to 110 cells : 2.1963972 hours what is the average rate of change in the number of cells between 9 hours and 11 hours? average rate of change: cells per hour what is the instantaneous rate of change after 7 hours? instantaneous rate of change: cells per hour note: you can earn partial credit on this problem.

Suppose the equation ||x-a|-b|=2008 has 3 distinct real roots and a not =0. find the value of b.