Beef, ground, 90% lean meat / 10% fat, patty, cooked, broiled

Grams of protein per 100 grams of food: 26.11
Percentage protein (of total Calories): 48.0

Amino Acid Percentage Score
Methionine+Cystine 3.65 1.46
Phenylalanine+Tyrosine 6.98 1.48
Tryptophan 0.56 0.79
Threonine 3.91 1.45
Isoleucine 4.40 1.76
Leucine 7.79 1.42
Lysine 8.31 1.63
Valine 4.90 1.53
Arginine 6.40 3.56

Percentage: Amino acid amount divided by total protein amount.
Score: Amino acid percentage divided by ideal value for this amino acid

See This article about complete protein for more information.