There are many ways you can write a ratio. They're all basically the same thing, though. 5:9, 5 to 9, and 5/9 (which is a fraction) are all just different ways to write ratios.
System b should be (-3,2)!
Answer:
1/65 is the answer. the main part behind it is using subtraction and divison to find the answer
20%.
20,000 times 0.8 is 16,000, so the decreased value that was lost was 20% of the original price.
168m - it is positive 147 - (-21), so the difference is 168m
