1-3 write in simplest form. does the first factor increase or decrease explain

The top # * and the bottom # *
so for the first one, 1*2 =2 
3*5 =15
so we get 2/15

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!