I do not know how to find the percent. My teacher wants us to use percent bar models to find the answer.

To find 20% of 70 you can multiply 70 by 20/100: 70*20/100 = 7*2/1 (cancel 2 zeros or divide both the numerator and denominator by 100).

Answer: 14 plants.

Note 20% = 1/5, so the answer can be found also as 70/5 = 14.

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