120. Convert Decimal to Irreducible Fraction (Simplified Form)

Objective: Given a decimal number, convert it into an irreducible fraction.

Irreducible Fraction: An irreducible fraction is a fraction in which the numerator and denominator are integers that have no other common divisors than 1. Ex: 1/4, 5/20, 1/2 etc

Example:

Input: 0.35
Output : 7/20

Input: 1.2
Output : 6/5

Approach:

• Split using decimal
• Find the decimal length
• Calculate the denominator
• Calculate the numerator Ex 1.2*10 = 12 { (int) Math.pow(10, b)}
• Find the greatest common divisor between the numerator and denominator.
• Now irreducible fraction = "" + numerator / gcd + "/" + denominator / gcd. 
• Read about - Greatest Common Divisor(GCD)

7/20
6/5