Hello good people of airtable!
I would like to know how to:
add two percentages together, then minus that percentage from an amount? to get the sum of that calculation
in this case-
FEE (£40) - (CUT (10%) + TAX (20%) = 30%) = PROFIT (£28)
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Welcome to the Airtable community!
Try converting {CUT} to a rollup field, then use this formula
{FEE} * (1 - ({CUT} + {TAX}))
When converting the lookup field to a rollup field, you can use the SUM(values) formula. Since there is only one value, the “sum” will the the same as the original value.
In general, I recommend using rollup fields instead of lookup fields in formulas whenever possible. Lookup fields have some weird behaviors in formula fields.
Welcome to the Airtable community!
Try converting {CUT} to a rollup field, then use this formula
{FEE} * (1 - ({CUT} + {TAX}))
When converting the lookup field to a rollup field, you can use the SUM(values) formula. Since there is only one value, the “sum” will the the same as the original value.
In general, I recommend using rollup fields instead of lookup fields in formulas whenever possible. Lookup fields have some weird behaviors in formula fields.
Thank you Kuovonne! very much appreciated 
t2:
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