28 is 40% of what number and how do i do me !

answer:

i dont know but hope u do

step-by-step explanation:

let us use engineering notation, for the sake of shortening the zeros expression, so 100,000 is just 1e5, namely 1 followed by 5 zeros, and 399 million is just 399e6, or 399 followed by 6 zeros and so on.

answer:

it was 5/16 of a page long.

step-by-step explanation:

that would be 1   1/4 - 1 1/4 * 3/4

= 5/4 - 5/4 * 3/4

= 5/4 - 15/16

=   20/16 - 15/16

= 5/16   (answer).