Question

Could someone help me please, also it would be super helpful of you if you also showed the work so i can figure out the rest of the problems.

Answer 1

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

1. We assume, that the number 321 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 321 is 100%, so we can write it down as 321=100%. 
4. We know, that x is 642% of the output value, so we can write it down as x=642%. 
5. Now we have two simple equations:
1) 321=100%
2) x=642%
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:
321/x=100%/642%
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 642% of 321

321/x=100/642
(321/x)*x=(100/642)*x       -we multiply both sides of the equation by x
321=0.15576323987539*x       - we divide both sides of the equation by (0.15576323987539) to get x
321/0.15576323987539=x 
2060.82=x 
x=2060.82

now we have: 
642% of 321=2060.82

I hoped this helped!