Sir Mike Ambrose is the author of the question.
Calculating area red/area square.
Let the single side length of the ascribed square be 2 units.
Therefore;
Area square is;
2*2 = 4 square units.
Area Red is;
(3/10) square units.
It implies;
Area Red ÷ Area Square is
(3/10) ÷ 4
= 3/40
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