Three electrical appliances each have power ratings of 178 watts, and 2 other appliances each have power ratings of 434 watts. what is the total power used by these appliances? 5 5/8 watts6 5/8 watts10 1/4 watts15 1/8 watts

Here is the solution of the given problem above:
Given: appliance A, B and C: 1 7/8 watts x 3 = 45/8 watts
           appliance D : 4 3/4 watts
           appliance E : 4 3/4 watts
           ?: total power used by these appliances
In order to know the total, we just have to add the number of watts. 
So we add 45/8 watts plus 38/4 watts. The common denominator for these two fractions is 32. Therefore, the final answer would be 15 4/32 or 15 1/8 watts. The correct answer would be the last option. Hope this answer helps.