Does anyone know the formula for calculating an individual's Neanderthal percentage?

I tried to run my raw data through Interpretome and it didn't take the FTDNA file. So I ran it through Promethease and out of the 42 SNPs I got 22 (see below), that seems like more than the average of 7 to 10 SNPs for Europeans, but it doesn't give me the %. So given my result, how do I calculate the estimated percentage of Neanderthal DNA I have?

rs10494778(A;G)

Frequency: 2.7%

References:0

rs4794826(A;G)

Frequency: 15.0%

References:0

rs1330692(A;G)

Frequency: 22.1%

References:0

rs16845098(C;T)

Frequency: 38.9%

References:0

rs6670818(A;G)

Frequency: 40.2%

References:0

rs10800485(C;T)

Frequency: 41.6%

References:1

rs10852939(C;T)

Frequency: 44.2%

References:0

rs17254301(C;C)

Frequency: 65.5%

References:0

rs17745316(G;G)

Frequency: 73.5%

References:0

rs10484939(A;A)

Frequency: 80.0%

References:0

rs17430552(T;T)

Frequency: 81.2%

References:0

rs11252810(C;C)

Frequency: 82.3%

References:0

rs963660(G;G)

Frequency: 82.3%

References:0

rs7536180(C;C)

Frequency: 83.2%

References:0

rs11815066(G;G)

Frequency: 85.8%

References:0

rs332951(C;C)

Frequency: 86.2%

References:0

rs16918958(C;C)

Frequency: 88.5%

References:0

rs12416000(G;G)

Magnitude: 0

Frequency: 78.8%

Repute:Good

References:0

rs17503834(T;T)

Magnitude: 0

Frequency: 80.5%

Repute:Good

References:0

rs16965666(T;T)

Magnitude: 0

Frequency: 88.5%

Repute:Good

References:0

rs9609421(A;A)

Magnitude: 0

Frequency: 95.6%

Repute:Good

References:0

rs16917040(T;T)

Magnitude: 0

Frequency: 100.0%

Repute:Good

References:0

I tried to run my raw data through Interpretome and it didn't take the FTDNA file. So I ran it through Promethease and out of the 42 SNPs I got 22 (see below), that seems like more than the average of 7 to 10 SNPs for Europeans, but it doesn't give me the %. So given my result, how do I calculate the estimated percentage of Neanderthal DNA I have?

rs10494778(A;G)

Frequency: 2.7%

References:0

rs4794826(A;G)

Frequency: 15.0%

References:0

rs1330692(A;G)

Frequency: 22.1%

References:0

rs16845098(C;T)

Frequency: 38.9%

References:0

rs6670818(A;G)

Frequency: 40.2%

References:0

rs10800485(C;T)

Frequency: 41.6%

References:1

rs10852939(C;T)

Frequency: 44.2%

References:0

rs17254301(C;C)

Frequency: 65.5%

References:0

rs17745316(G;G)

Frequency: 73.5%

References:0

rs10484939(A;A)

Frequency: 80.0%

References:0

rs17430552(T;T)

Frequency: 81.2%

References:0

rs11252810(C;C)

Frequency: 82.3%

References:0

rs963660(G;G)

Frequency: 82.3%

References:0

rs7536180(C;C)

Frequency: 83.2%

References:0

rs11815066(G;G)

Frequency: 85.8%

References:0

rs332951(C;C)

Frequency: 86.2%

References:0

rs16918958(C;C)

Frequency: 88.5%

References:0

rs12416000(G;G)

Magnitude: 0

Frequency: 78.8%

Repute:Good

References:0

rs17503834(T;T)

Magnitude: 0

Frequency: 80.5%

Repute:Good

References:0

rs16965666(T;T)

Magnitude: 0

Frequency: 88.5%

Repute:Good

References:0

rs9609421(A;A)

Magnitude: 0

Frequency: 95.6%

Repute:Good

References:0

rs16917040(T;T)

Magnitude: 0

Frequency: 100.0%

Repute:Good

References:0

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