2/3 divided by 4/6. reduce if possible

Apark is in the shape of a rectangle. the park authorities are planning to build a 2-meter-wide jogging path in the park (shown as the shaded region in the image). what is the area of the jogging path? plz

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

1) prove that 731^3−631^3 is divisible by 100 2) prove that 99^3−74^3 is divisible by 25