What does a 6.8 second 55 meter equate to in 100 meter?

Answer 1

For this you would need a ratio. 6.8/55 = x/100 , cross multiply, so 680 = 55x , then divide 680/55 = x and then you have x= 12.3636..

Answer 2

Multiply by 100/55 or 20/11 - except that this implies that you can keep up the 55 metre pace for 100 metres. Most unlikely!