a ratio is like a percentage like if you say 50% the ratio would be be 50:100 and the 100 is because there's 100 total like 50% out of a total of 100%.
it means a number verses another number, like a fraction
Here;s an example
you have 10 white marbles, 3 blue marbles, and 7 green marbles. what is the ratio of green marbles to the total amount of...