because a fire rarely destroys whole building or all its contents, many businesses take out policies that cover only a portion of the value of the building or its contents. they thus save money on premiums by covering only 40% of their property's value. for example, to encourage businesses to take out full insurance, insurance companies offer plans that include a coinsuance clause.such a clause means that the insured gets full protection from the insurance company only if the property is insured for 80% of its replacement value.If the policy covers only 40% of the value, then the insurance company pays only a portion of the loss.