public static Rational valueOf(BigDecimal x) {
BigInteger num = x.unscaledValue();
BigInteger den = BigInteger.ONE;
int scale = x.scale();
while (scale > 0) {
den = den.multiply(BigInteger.TEN);
--scale;
}
while (scale < 0) {
num = num.multiply(BigInteger.TEN);
++scale;
}
Rational rv = new Rational(num, den);
rv.reduce();
return rv;
}
