Answer: Division of Equality
Step-by-step explanation: In this equation, using division, we can find what y is by dividing 5 on both sides. Y equals to 15.
To find what percent of something something is you first divide the part by the whole (85/100=0.85) and then multiply that by 100 (0.85 * 100=85) this means you get 85%
The midpoint would be (5,9)