Short Answer 
The process begins by identifying the problem, which involves calculating the extra marks Rohit needs to pass and the necessary percentage increase from his current score. With total marks of 300, qualifying marks of 150, and a current score of 120, Rohit requires 30 additional marks, translating to a 25% increase to qualify for the exam.
Step 1: Understand the Problem
Begin by identifying what needs to be calculated. In this case, we must determine the number of additional marks Rohit requires to pass the exam and the percentage increase needed based on his current score. Establishing this foundation is crucial for accurate calculations.
Step 2: Identify the Key Values
Gather the critical data points necessary for the calculations. This includes:
- Total marks for the exam: 300
- Qualifying marks: 150
- Marks scored by Rohit: 120
These values will help you perform the calculations needed to find the additional marks and percentage increase.
Step 3: Calculate Marks Needed and Percentage Increase
First, compute the additional marks Rohit needs:
- Marks needed: 150 (qualifying marks) – 120 (Rohit’s score) = 30 marks
Next, calculate the required percentage increase:
- Percentage needed: (30 marks needed / 120 marks scored) ‚à öo 100 = 25%
This means Rohit must increase his score by 25% to qualify for the exam.