11/12 as a fraction is 11/12; as a decimal it is ~ 0.9167
They will have the same Perimeter, unless you shrink or grow the image then nothing with change
The dragons would have to speed up to balance out the time that they slowed down.
The instantaneous rates of changes are all the individual speeds at given times. If you have some that are slow, you will need to have just as many that are fast to balance it out and ensure they have the correct average speed.
90 round to the nearest hundredth