The qualified rate do not need to know that there is no qualified products, only need to know the total number of products and the total number of qualified can be.
Example: a factory inspection and delivery of 100 products, there are 48 pieces of qualified products, the qualified rate of:
48 ÷ 100 × 100% = 48%,
Qualified rate is generally expressed as a percentage, you can also use the fraction.
Expanded information:
Products qualified by the standards:
1. National standards
National standards are proposed by the competent authorities of the State Council, approved and published by the General Administration of National Standards, and implemented throughout the country. National standards are coded as "GB" (mandatory standards) or "GB/T" followed by two sets of numbers, the first set of numbers indicates the order of the standard number, the second set of numbers indicates that the standard approval or re-revision of the age.
2. Enterprise standards
Enterprise standards formulated and published by the enterprise, within the scope of the enterprise standards for uniform use. Its code is composed of "Q" plus a slash plus the enterprise code. China's product quality certification mark quality mark and import and export commodity inspection mark.
Quality mark by the square symbol, the Great Wall logo and PRC logo. Circle mark can be divided into qualified certification mark and safety certification mark. Import and export commodity inspection mark is divided into "safety mark", "health mark" and "quality mark".