If each side of an equilateral triangle is triples then what is the percentage increase in the area of the triangle?

Question

Philoid · Accepted Answer

When each side of triangle = a

Area of an equilateral triangle = = A

When each side of triangle = 3a

Area of an equilateral triangle = = = 9A

Increase in area = 9A-A = 8A

Percentage increase in area = = = 800%