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I have told you several times. If diameter of a circle is reduced to 75%, then the area of the circle is reduced to 56%. This comes from the formula:
Area of a Circle= PI*(R^2)
If Diameter is 1, then the area is 0.78
If diameter is 0.75, then the area is 0.44, which is 56% of 0.78.
As you see, a 25% reduction in diameter results in a 44% reduction in area.
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