Final answer:
To find all the whole number ratios equivalent to 168 : 56, divide both sides of the ratio by the greatest common divisor. The equivalent ratio is 3 : 1.
Step-by-step explanation:
To find all the whole number ratios equivalent to 168 : 56, we need to divide both sides of the ratio by the greatest common divisor of 168 and 56, which is 56.
168 ÷ 56 = 3
56 ÷ 56 = 1
So the equivalent ratio is 3 : 1.