mathematical content

Question 1

what is the formula for calculating percentages?

Answer 1

divide the part (the smaller value) by the whole and then multiply by 100

Question 2

how do you convert a percentage to a decimal?

Answer 2

remove the % sign and move the decimal point two places to the left

Question 3

how do you convert a decimal to a fraction?

Answer 3

• start by working out the number of decimal places in your number
• if there are two decimal places then you divide by 100
• if there are three decimal places you divide by 1000
• the number of decimal places = the number of zero’s

Question 4

explain ratios

Answer 4

• they should always be reduced as with a fraction, by finding the highest common factor

Question 5

explain estimates

Answer 5

• can provide a broad idea