77 is what percent of 1380 - step by step solution

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

1. We assume, that the number 1380 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 100% equals 1380, so we can write it down as 100%=1380.
4. We know, that x% equals 77 of the output value, so we can write it down as x%=77.
5. Now we have two simple equations:
1) 100%=1380
2) x%=77
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:
100%/x%=1380/77
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 77 is what percent of 1380

100%/x%=1380/77
(100/x)*x=(1380/77)*x       - we multiply both sides of the equation by x
100=17.922077922078*x       - we divide both sides of the equation by (17.922077922078) to get x
100/17.922077922078=x
5.5797101449275=x
x=5.5797101449275

now we have:
77 is 5.5797101449275% of 1380