Thomas has finished 4 problems of his weekly math homework. If he needs to solve a total of 20 problems, which of the following shows the equivalent of the percentage of his math homework Thomas still needs to complete?
A. 20/100
B. 80/100
C. 0.20
D. 0.08
To find the percentage of Thomas's math homework that he still needs to complete, we can subtract the number of problems he has finished from the total number of problems and then divide by the total number of problems.
The number of problems Thomas still needs to complete is 20 - 4 = 16.
The percentage that Thomas still needs to complete is given by: (16/20) * 100 = 80%.
Therefore, the answer is B. 80/100.