Why are several ingredients less than 100% in the “Mixed Oatmeal” ingredient list?

Yesterday, a netizen asked me in a private message on Weibo why the ingredients in the “mixed cereal” ingredient list do not add up to 100%?

Because of this kind of raw materials, it is difficult to achieve standardized production as accurately as industrial products. The addition amount promises that several ingredients are not less than a certain amount, and the rest are combined by different products in the ingredients in an uncertain amount, so the total is less than 100%.

For example, take the product sent by this netizen as an example: that is, under the condition of consistent total weight, the content of 88% and 2.5% Yes at least, the remaining weights are combinations of oats, triticale, barley, rye.