# Ratios and rounding figures to nearest thousand

I'm using the WHO Suicide Statistics to try and ascertain the rate of suicide per 100,000 of the population. I'm afraid I'm not from a maths background and this is the first time using Stack Mathematics, so forgive me if this sounds simple.

So, I have two questions:

1. How do I calculate this rate?
2. What is the logic/methods behind rounding ratios?

Below is an mock example of the data I'm using:

  Country    Suicides    Population

Italty     5000        45000000
Burma      350         2365000
Ghana      1100        14550000


My first step was to calculate the ratio of suicides to population, i.e.

  Ratio = suicides / population

Country    Suicides    Population   Ratio

Italty     5000        45000000     0.00011
Burma      350         2365000      0.00014
Ghana      1100        14550000     0.00007


So, how can I ascertain how many suicides are estimated for every 100,000 people in this example?

• You've done the key step already. By computing Ratio you have determined the multiplicative factor. Take Italy, say. Just as $5000=.00011\dots \times 45,000,000$ we have $11.111\dots = .00011\times 100,000$. Thus there are $11.111\dots$ suicides in Italy out of every hundred thousand people. – lulu Dec 28 '18 at 15:06