Question

12.96 ÷ 5.4 = 5.4 how

Answer 1

To get the solution, we are looking for, we need to point out what we know. 

1. We assume, that the number 12.96 is 100% - because it's the output value of the task. 
2. We assume, that x is the value we are looking for. 
3. If 12.96 is 100%, so we can write it down as 12.96=100%. 
4. We know, that x is 5.4% of the output value, so we can write it down as x=5.4%. 
5. Now we have two simple equations:
1) 12.96=100%
2) x=5.4%
where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:
12.96/x=100%/5.4%
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for what is 5.4% of 12.96

12.96/x=100/5.4
(12.96/x)*x=(100/5.4)*x       - we multiply both sides of the equation by x
12.96=18.518518518519*x       - we divide both sides of the equation by (18.518518518519) to get x
12.96/18.518518518519=x 
0.69984=x 
x=0.69984

now we have: 
5.4% of 12.96=0.69984