Both networks showed a list of prices and calculated the new price with a 15% GST. Both failed miserably when it came to such a simple calculation and have no doubt confused an entire country.
When a product sells for $1500 the GST component of that price is $166.66 (rounded to 2 decimal places) and the GST excl price of the product is $1333.33 (rouded to 2 decimal places).
To deduct GST from a price divide it by 9 to establish the GST value or divide it by 1.125 to establish the GST exclusive amount,
Both networks simply added 2.5% onto the existing GST inclusive price which is wrong and does not give the correct amount. To calculate the new 15% GST inclusive price, the current 12.5% GST needs to be deducted from the current retail and the new 15% GST rate added to this GST excl price.
On TV3's example of a $1500 TV they show the new price of $1537.50, a $37.50 increase. 15% GST on the GST excl price of $1333.33 is $200.00, giving a new retail of $1533.33, a $33.33 increase.
$1.50 is a only a negligible difference due to rounding
$200 -> $205 when it should be $204.44
$1500 -> $1537.50 when it should be $1533.33
How can you trust either network to deliver is accurate news when they're unable to calculate a basic maths equation?
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