For this question, you will need to find the area of the garden. To do this, you will multiply the length of one side of the garden by the length of the other side of the garden, which should give you 60 square feet. Since only 1 plant can be planted per suqare foot, 60 is therefore your answer to this question.
For this case we can make the following rule of three: 21 ------> 70% x --------> 100% Clearing x we have: x = (100/70) * (21) Rewriting we have: x = (10/7) * (21) x = 30 Thus, 21 is 70% of 30 Answer: 21 is 70% of 30
