Answer:
Hope that answers your question
It would be a 90%. In the calculator 18 is what percent of 20.
You just need to have the variable by itself, so move the -6.72 to the other side (that will make it +6.72)
So you should have this equation now: y = 253+6.72
Then just add them and you have this: y = 259.72
And that is your answer!
Hope I helped! <3
4 fits into 24 6 times so 24/4 written as a whole number is 6! I hope this helped :D