Hi i would just like to know the first step of this i think I know how to do the rest

Do the parenthesis (-7/4)) which is -7/4 which gives u -1.75 or - 1 3/4 then subtract that by 2/3 which gives you - 2 5/12 or in decimal form −2.41666666666

Step-by-step explanation:

That should be correct from what I remember in math with fractions

3.76%

step-by-step explanation:

introduction, methodology, results, discussion

step-by-step explanation:

an observational study is one which consists of actual observation to record data and then analyse the data.

there are a number of factors that should be analyzed before starting an observational study.

the main four factors are:

i) introduction:   this should be analysed to check whether the purpose of the study is correctly established and the data recorded are appropriate for the study

methodology:   the method of collecting the data, such as whether randomly selected, and whether sample size matches with the population to be studied, whether questions asked are easy to answer by common men, etc.

results: then results such as summary of data with comments should be studied thoroughly

discussion:   the last is the discussion, this can be either by management people or persons who are all interested , etc.