there is original yield and desired yield
divide the desired by the original the result will be Conversion Factor
For , the column of yield = 4 serving
Conversion Factor = 4 / 8 = 0.5
So, for each value at the original multiply by 0.5
So,
1 1/2 * 0.5 = 3/4
For 80 serving:
Baking powder = 1 * 10 = 10
salt = 1/4 * 10 = 2 1/2
cinnamon = 1/2 * 10 = 5
nutmeg = 1/8 * 10 = 1 1/4
egg = 1 * 10 = 10
sugar = 1/2 * 10 = 5
buttermilk = 1/2 * 10 = 5
vegetable oil = 1/4 * 10 = 2 1/2
vanilla = 1/2 * 10 = 5
chocolate chips = 3/4 * 10 = 7 1/2