The humidity dropped an average of 1 1/3% each hour over the last six hours. what was the total change in humidity?

a: -8%

b: -6 1/3%

c: -7 1/3%

d: -6 1/2

1. isolate the variable, in this case, d. subtract 35.5 on both sides of the equation.2. 52 subtracted by 35.5 is 16.53. therefore your answer would be d= 16.5this is the basics of pre algebra, isolating variable through adding, subtracting, multiplying, and dividing, if you have any other questions to ask just comment!