<span><span>(<span><span><span><span><span>4<span>x<span>−2</span></span></span><span>y^3</span></span>x</span></span><span>y<span>−4</span></span></span>)</span><span>−2</span></span><span>
=<span><span><span><span><span>x6</span><span>y^8/</span></span><span>16<span>y^6</span></span></span></span></span></span><span>
=<span><span><span><span>x^6</span><span>y^2/</span></span><span>16
Hope this helps:)
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The original is 5 cm, the reduced image is 2.5
2.5/5 = 0.5 = 1/2
The scale for the reduced image is 1/2