How do you write 9.964 as a percentage

Do u just plot the numbers on the graph like (1,

The decibel level of sound is 50 db greater on a busy street than in a quiet room where the intensity of sound is watt/m2. the level of sound in the quiet room is db, and the intensity of sound in the busy street is watt/m2. use the formula , where is the sound level in decibels, i is the intensity of sound, and is the smallest sound intensity that can be heard by the human ear (roughly equal to watts/m2).

James was playing a game with his friends. he won 35 points. then he lost 15, lost 40 and won 55. how did he come out