If you have an * adjustment under section 21 - 5, 21 - 10, 136 - 30 or 136 - 35 in relation to a supply that was partly a * taxable supply, the amount of that adjustment is reduced to the following amount:
where:
"full adjustment" is what would be the amount of the adjustment worked out under section 21 - 5, 21 - 10, 136 - 30 or 136 - 35 if this section did not apply.
"taxable proportion" is the proportion of the * value of the supply (worked out as if it were solely a taxable supply) that the taxable supply represents.
Example: If the amount of an adjustment under section 21 - 5 would be $100 but the supply was only 80% taxable, the amount of the adjustment is $80.