- This topic has 5 replies, 2 voices, and was last updated 11 years ago by .
Viewing 6 posts - 1 through 6 (of 6 total)
Viewing 6 posts - 1 through 6 (of 6 total)
- You must be logged in to reply to this topic.
Interactive BPP books for September 2026 exams, recommended by OpenTuition.
Get discount code >>
Forums › Ask ACCA Tutor Forums › Ask the Tutor ACCA PM Exams › Basic F5 Mathematical Question
How do you know when to use, for example:
1.10% instead of 100/90?
You are going to have to be more specific – they are two different things and it depends what you are trying to do!
The issue I had this with is the question called Chaff Co. from the June 2008 past paper. The question states that labour is normally paid $18 per hour. Idle time is expected to be 10% of hours paid and is not reflected in the $18 per hour.
Why is 100/90 *$18 used in this case for the labour efficiency variance and idle time variance and not 1.10%*$18?
For every 100 hours that they pay, there will be 10 hours idle and therefore 90 hours worked.
Putting it the other way round, for every 90 hours of work, they need to pay for 100 hours.
So we multiply by 100/90
(The free lecture on advanced idle time variances will help you!)
Thank you!
You are welcome 🙂
