1+2+3=6566464667676466*4**466464*4**1564664*4
$6,387.40 per month. <span>The following formula is used to calculate the fixed monthly payment (P) required to fully amortize a loan of L dollars over a term of n months at a monthly interest rate of c.</span> P = L[c(1 + c)^n]/[(1 + c)^n - 1]
16/25 is the highest, because if you multiply it by four you get 64/100, and the rest of the fractions are negative.
