After finishing his work out Justin‘s heart rate decrease 3 bpm for each of the next four minutes what was the change in Justin‘s heart rate after four minutes

if you mean

then it's c. 8, -7/3

but if you mean

then it is

6mm^3 or .6cm^3

      216

      /   \

  36     6

  /   \     /

6     6   6

factor trees are nice.

1/8 3/16 3/4

step-by-step explanation:

you put them as all the same denominator and multiply