function safediv

function safediv(
    p_value_1 in number,
    p_value_2 in number
) return number

safe division by zero

function get_fnum

function get_fnum(
    p_value in number,
    p_decimals in number:=2
) return number

get number formatted with specified number of decimals

function is_within_pct_of_value

function is_within_pct_of_value(
    p_value1 in number,
    p_value2 in number,
    p_pct in number
) return boolean

return true if value is within given percentage of other value