There are no choices, but can be changes in the following ways: multiplying the numerator and the denominator by the same amount, or dividing the numerator and denominator by the same amount.
So 1000987 in 3 years or 1000987:3 or i like to put it as 1000987:3 we notice that 6 is 2 times of 3 so we just multiply 1000987:3 by 2 and get 2001974:6 2001974 in 6 years