DRDO Multi tasking staff Model paper 5

Let numerator and denominator be N and D respectively.
Numerator increased by 30% = N + 30% of N = 1.30N
Denominator decreased by 30% = D - 30% of D = 0.70D
According to the question,
1.30N/0.70D = 26/7
Solving this we will get N/D = 2/1