Dilation with a scale factor 1/3. the original points are three times as big as the transformed points, so the transformation needed to reduce the size by three times smaller.
Let P be the number of kids, we know P>57 take 1-(1/2)-(1/5)=3/10 therefore 57 is 3/10P 3/7P=57 P=57*7/3=133 is the answer it would be incorrect if we didnt get a positive integer.
