The total number of PG employees in the Finance and R & D departments together…

Concept

To convert a percentage into a count, multiply the total count by the percentage written as a fraction of 100.

For a comparison asking “how much less,” subtract the smaller total from the larger total after calculating both quantities on the same basis.

Application

1. Finance PG employees = 80% of 600 = (80/100) × 600 = 480.

2. R & D PG employees = 90% of 400 = (90/100) × 400 = 360.

3. Combined PG employees in Finance and R & D = 480 + 360 = 840.

4. Marketing has 45% female employees, so male employees = 55% of 2000 = (55/100) × 2000 = 1100.

5. Required difference = 1100 − 840 = 260 employees.

Cross-check

Adding the difference back to the smaller count gives 840 + 260 = 1100, which matches the independently calculated number of male Marketing employees.

Therefore, the Finance and R & D PG total is 260 less.