The equation is asking how much out of Jada's total budget (1545) is spent on electricity a month (47.20). write this as a fraction 47.20/1545 type into calculator and you get .03055 multiply that by 100 to get it as a percent. you get 3.055% now round that to the nearest tenth and you get 3.1% answer 3.1%
Go to the very bottom of the table, look at the stem of 7 and the leaf of 2 (largest leaf of the group). Combining the stem and leaf leads to 70+2 = 72