The ratio of the lengths of the corresponding sides of two rectangles is 8: 3. the area of the larger rectangle is 320 ft2. what is the area of the smaller rectangle? a 30 ft2
b 45 ft2
c 120 ft2
d 90 ft2

I’m stuck on this i don’t understand.

Will give brainliest if you answer question correct

Sanderson is having trouble with his assignment. his shown work is as follows: − 3 7 7 3 = − 3 7 × 7 3 = − 21 21 = −1 however, his answer does not match the answer that his teacher gives him. complete the description of sanderson's mistake. find the correct answer.