Answer:
So that it is safe from insects. insects cant open large boxes bottles or a steel can.
Decimal : 1.5
Percent : 150%
The largest number that divides 63, 84, and 105 evenly is 21.
David can put 21 of each kind of tile in a row.
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These numbers are 3*21, 4*21, and 5*21, respectively.
