Because that's how many times the quotient goes into the whole number.
100 divided by 4 = 25
100 divided by a lesser number than 4, say 2, = 50
100 divided by an even lesser number than 4, say 1, = 100.
The best statement to describe him is: he is greatful; he is clearly greatful for the help he’s receiving with helen and is willing to compensate in cash for it
Credible would be
Someone who's credible is honest and believable. ... Similar to words like reliable and plausible, credible is an adjective that comes to us from the Latin credibilis, meaning “worthy to be believed.” A credible reputation is often earned through consistent good behavior and an overall trustworthy personality.