The correct answer is 1. 028Concept:Lactometer is an instrument used to find the purity of milk. This is a hydrometer that measures the specific gravity of milk. The specific gravity of milk ranges from 1. 028 to 1. 032. By using this formula, we can compute the specific gravity of milk. Specific gravity of milk = (Corrected Lactometer Reading ÷ 1000) + 1. Given:CLR of milk = 28. Calculations:Specific gravity of milk = (Corrected Lactometer Reading ÷ 1000) + 1. = (28÷1000) + 1 ?= (0. 028) + 1= 1. 028Additional Information Specific gravityValueSalt4. 12Lactose1. 666Skim milk1. 036Protein1. 346Fat0. 93