Questions of the form "find 40% of 100".
In order to answer this you multiply the number, 100, by the percentage over 100, 40100
100×40100=40
Remember: Give you answer to 2 decimal places.
Questions of the form "if a mixed bag of 30 sweets contains 15 mints and 15 chocolates. What percentage of the contents is chocolate"
To calculate the percentage of chocolate sweets in the bag you must divide the number of chocolates by the total number of sweets and then multiply by 100.
$\dfrac{\var{chocolate}}{\var{sweets}}\times 100 = \simplify{100*{chocolate}/{sweets}}.
Remember: Give you answer to 2 decimal places.
Questions of the form "convert 5366 into a percentage"
This question is very similar to part b). We already have the number in fractional form if we covert this into a decimal and multiply by 100% we obtain the percentage
5366=deciamal×100%=80.303030303%
Remember: Give you answer to 2 decimal places.
Questions of the form "convert 94% into a fraction"
To do this you simply divide by 100.
94%=94100=4750
Questions of the form "Last year the average mark in an exam was 45. They have now increased by 13 percent. What is the current average mark?"
We start by finding 13 % of 45.
45×13100=5.85
We then add this onto last years average marks to find this years
45+5.85=50.85