Question

If the length and width of rectangle A are 10% and 30% less,respectively, than the length and width of rectangle B, then the area of A is equal to what percent of the area of B

Answer 1

it will be 63 % of area of B

Answer 2

how did you do that

Answer 3

let c and d be the length and width of B, area =c*d
now length and width of A will be 0.9c and 0.7d

Answer 4

area of b= 0.9c * 0.7d= 0.63 *c *d=0.63* area of B
which is 63%

Answer 5

How does this percentage change if the length and width are 10% and 30% greater respectively?

Answer 6

greater means area of b = (1.1 *c) *(1.3*d)
=1.43*c*d= 43% increase from the original value