



 
Hi Sandra, I read this to say that the lengths of the sides are reduced by a scale factor of 1/3. One of the sides has length 6.3 cm and one third of 6.3 is $\frac13 \times 6.3 = 2.1$ cm. Thus the length of the new rectangle is 6.3  2.1  4.2 cm. You can do this in one step. If you reduce the length by one third you are left with two thirds and $\frac23 \times 6.3 = 4.2.$ What about the other side? Penny  


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