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Apart from the material itself being cheaper , the nylon chips use a visible - spectrum colorimetric system to display results , so that they can be read using an ordinary optical scanner , which costs 50 - 70 % less than using a special laser detector .
 percent: 50 - 70 %
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: date, organization, person, geographical social political, national religious political, facility, cardinal, location, work of art, law, event, product, ordinal, percent, time, quantity, money, language 
Text: {0} 
Answer:
 percent: 50 - 70 %