1. We assume, that the number 110.2 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 110.2 is 100%, so we can write it down as 110.2=100%. 4. We know, that x is 17.7% of the output value, so we can write it down as x=17.7%. 5. Now we have two simple equations: 1) 110.2=100% 2) x=17.7% 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: 110.2/x=100%/17.7% 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 17.7% of 110.2
110.2/x=100/17.7 (110.2/x)*x=(100/17.7)*x - we multiply both sides of the equation by x 110.2=5.64971751412*x - we divide both sides of the equation by (5.64971751412) to get x 110.2/5.64971751412=x 19.5054=x x=19.5054
Simple interest means that it's not added. You would need to multiply 200 and .12, yielding 24. That's the interest. The total he owes is 224, please mark as brainliest