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allowance for Wastage

KKassandra10y ago
Hi, This may be a weird question but when making an allowance for wastage, e.g 20% material lost through process, why is it calculated as $20 cost x 100/80 = 25...and not $20 x 1.20 = 24?
John MoffatJohn MoffatTutor10y ago#1
Suppose you were to input 100, then the waste would be 20% x 100 = 20, and the output would be 100 - 20 = 80. So for every 80 of output then the input would be 100. So the input will be 100/80 x the output.
KKassandra10y ago#2
ok Thank you...
John MoffatJohn MoffatTutor10y ago#3
You are welcome :-)
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