1. 0.003 to a percent:
0.003 x 100= 0.3
Jordan is correct.
3. They can be both correct. Here is an example of a problem that says Mark's team scores 500% more goals and Jonas says they scored 5x more goals.
Mark's team scores 5 goals while the other team scores 1.
Here is a video about converting fractions, decimals and percents.