What is the difference between part to part ratio and a part to whole ratio ?

Ratios can be part-to-part, part-to-whole, or whole-to-part. Let's take a look at what this means.

When we compare boys to girls in a classroom, we are comparing part of the class to another part of the class. This would be a part-to-part comparison.

When we compare boys to the whole class, this is a part-to-whole comparison.

If we were to compare the class to the girls, this would be whole-to-part comparison.

EXAMPLE: A class is made up of 14 girls and 15 boys. 

PART_TO_PART 14 : 15 shows girls to boys

PART_TO_WHOLE 14: 29 shows girls to the class

Whole-to-Part 29 : 14 shows the class to the girls

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Answer: b 2 = 1.

step-by-step explanation: given equation a = h(b 1+b 2)

also we are given values of a, h and b 1 as :

a = 16, h = 4, and b 1 = 3.

in order to solve it for b 2, we need to plug the given values of   a, h and b 1 .

therefore, plugging values of   a, h and b 1   in given equation, we get

16 = 4( 3 + b 2)

first dividing both sides by 4, we get

4 = 3 + b 2

subtracting 3 from both sides, we get

4 -3 = 3 -3 + b 2

1 = b 2.

therefore, b 2= 1.