30. The amount considered a significant minority is not specified by the earlier poskim (א''א בוטשאטש סי' תס''ג סוד''ה וגבי ביצים ). However, the Acharonim give various amounts for this. This is applicable to multiple types of checking, e.g., the treifa status of animal lungs, shaatnez, insects, and others (see Issue 115, par. 26 and on regarding shaatnez).
31. 30%-40%. Some imply that it refers to something common, just that is in the minority. They imply even 30% is considered a significant minority (שו''ת ריב''ש סי' קצ''א, משמרת הבית פ''ב עמ' ע''א ), or even 40% (שו''ת משנה הלכות ח''ז סי' צ''ט ).
32. 10%. Some understand that the amount considered a significant minority is 10% and higher (שו''ת משכנות יעקב יו''ד סי' י''ז ד''ה ותרתי הובא בדרכ''ת סי' ל''ט סק''ג ). This is the opinion of multiple contemporary poskim, who say this is the prevalent minhag (מו''ר בשו''ת קנה בשם ח''א סי' מ''ט, שו''ת מנחת שלמה תנינא סי' ס''ג, הגריש''א קובץ תשובות ח''ג סי' קי''ג ).
33. 4%-5%. Some contemporary poskim treat something as a significant minority even if it is between 4% and 5% (בספר בדיקת המזון כהלכה בשם הגריש''א ובשם הגר''נ קרליץ ובשם הגר''ח קנייבסקי ).
34. The minority is present. Some have a different definition of “מיעוט המצוי.” Namely, it does not depend on a percentage, but it means the minority appears together with the majority at all times and places. In other words, if in every bag of fruit, there are one or two with bugs, even though it is just a minority of the bag, that minority is always there (שו''ת שבט הלוי ח''ד סי' פ''א). However, the main, accepted opinion is 10%, as mentioned.
