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Number of bags per site tested before 2012 based on study it dropped by 62% down to 80 bags per site in 2012 is 129 (approximately).
As given,
In 2012, bag per site tested dropped by 62%
Let n be the number of bags per site before 2012
As per condition,
62% of n = 80
⇒(62/100) × n = 80
⇒ n = (80 × 100)/62
= 129.03
≈ 129
Therefore, number of bags per site tested before 2012 based on study it dropped by 62% down to 80 bags per site in 2012 is 129 (approximately).
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