I think Larry's method is simple and clear enough
Active trqnsport is a biological process that involves the movement of mineral ions(in plants} and glucose and amino acids (in humans)from areas of low concentration to areas of higher concetration by cellular energy.The liquid carrier trasporting the
subtsance must obey the countinuity...
Robert's method and answer are correct, but one can go a step further to explain to a young learner to satisfy his coriousity.
First determine the LCM of 3,9,27 by factoring.
3 = 3x1
9 = 3x3x1
27 = 3x3x3x1
In solving the given problem, 2 2/9 + 6 1/3 +8 2/27
collect the whole number,...