factor is the highest number that divides exactly into two or more numbers|multiple is the smallest positive number that is a multiple of two or more numbers|show the relationship between two (or more) related quantities|: is the mathematical symbol used to represent ratios.|If each value in a ratio is multiplied or divided by the same number an ____ ratio is formed.|ratios are found by dividing both numbers in the ratio by their highest common factor (HCF)|involves finding the value of ‘one unit’ and then using this information to solve the problem.|compare quantities measured in different units|the two different units are separated by a ______ , which is the mathematical symbol for ‘per’|is calculated by dividing the total change in one quantity by the total change in the second quantity|is a measure of how fast an object is travelling|if the speed of an object does not change over time|is how fast velocity changes|Slowing down|When speed is not constant, due to acceleration or deceleration