What percentage of the body is burned if a 16 year old male burned his back, the back of his left leg, and his entire right arm?

You can solve this question using "rule of nine" to calculate the area of the body. Each arm equals to 4.5% so entire arms would be 4.5%.

Each side of body trunk equal to 18%, so entire back would be 18%.

Each leg equal to 18%, back of the leg would be half of it so it will be 9%.

The total would be: 4.5% + 18%+9% = 31.5%