Evaluate the infinite geometric series 0.4 + 0.036 + 0.0000324 + ... Express your answer as a fraction with integer numerator and denominator.
The common ratio is .036 / .4 = 9/100
The sum is
.4 / (1 - 9/100) = (4/10) / ( 91/100) = 40 / 91
+603 
