Summary For Numbers
Numbers can be divided into 3 sub-groups, ratio, percentage, and fractions.
What: a fraction is a number over another number which represents the whole eg. 3/4 where 4 is the whole
When: We use it for mixing ingredients(eg. 1/2 a tablespoon of vinegar) and when creating a budget(eg. I will save 1/2 of my allowance)
Why: To help us estimate portions
How: We use it to find out how many equal parts to divide the whole into
What: It is a comparison between two or more amounts in units
When: In recipes for mixing things(eg. 1 part water 2 parts juice concentrate)
Why: to compare two numbers side by side and to be able to increase them porportionally
How: multiply a number by both sides to get bigger numbers according to what is needed
What: a number over hundred (35%=35/100)
When: In sales or in taxes to represent the amount that is changed.
How: Multiply a number by the percentage
Bottom line: Ratio, fractions and percentage are very similar in the fact that they are used to compare numbers.