As part of a major plant renovation project, the industrial engineering department has been asked to balance a revised assembly operation to achieve an output of 240 units per eight-hour day. Task times and precedence relationships are as follows:

Task	Duration (minutes)	Immediate Predecessor
a	0.2	-
b	0.4	a
c	0.2	b
d	0.4	-
e	1.2	d
f	1.2	c
g	1.0	e, f

d. Compute the percentage of idle time for the assignment in part d. Use the actual bottleneck cycle time in your calculation. (Round your answer to 2 decimal places.)