Percentage
A number is increased by 50%, then decreased by 50%. What is the net percentage change?
A No change
B 20% decrease
C 25% decrease
D 50% decrease
Correct Answer:
C. 25% decrease Explanation:
Let number = 100. After 50% increase: 150. After 50% decrease: 150 × 0.5 = 75. Net change = (75-100)/100 × 100 = -25%.
A factory produces 5000 units. Due to machinery issues, production decreases by 30%. How many units are produced now?
A 3000 units
B 3200 units
C 3500 units
D 4000 units
Correct Answer:
C. 3500 units Explanation:
New production = 5000 × (1 - 0.30) = 5000 × 0.70 = 3500 units.
The ratio of boys to girls in a school is 3:2. What percentage of students are girls?
Explanation:
Total parts = 3 + 2 = 5. Girls = 2/5 = 0.4 = 40%.
A product costs ₹800 to manufacture. The company wants a 35% profit margin. What should be the selling price?
A ₹1035
B ₹1050
C ₹1080
D ₹1100
Explanation:
SP = CP × (1 + profit%) = 800 × 1.35 = 1080.
In 2024, a company had 500 employees. In 2025, it increased workforce by 18%. How many employees does it have now?
A 590 employees
B 610 employees
C 620 employees
D 650 employees
Correct Answer:
A. 590 employees Explanation:
New employees = 500 × (1 + 0.18) = 500 × 1.18 = 590.
A bank offers 8% simple interest annually. If ₹5000 is invested for 3 years, what is the total amount?
A ₹6200
B ₹6400
C ₹6500
D ₹6800
Explanation:
SI = (P × R × T)/100 = (5000 × 8 × 3)/100 = 1200. Total = 5000 + 1200 = 6200.
A property's value appreciated by 12% in 2024 and by 8% in 2025. If its value was ₹10 lakhs initially, what is its current value?
A ₹12.09 lakhs
B ₹12.10 lakhs
C ₹12.15 lakhs
D ₹12.20 lakhs
Correct Answer:
A. ₹12.09 lakhs Explanation:
Value after 2024 = 10 × 1.12 = 11.2 lakhs. Value after 2025 = 11.2 × 1.08 = 12.096 ≈ 12.09 lakhs.
Two successive discounts of 10% and 20% are applied to an item. What is the equivalent single discount?
Explanation:
Equivalent discount = 100 - (90 × 80)/100 = 100 - 72 = 28%.
A merchant buys goods worth ₹8000 and marks them up by 60%. He then offers a 25% discount. What is his profit percentage?
Explanation:
MP = 8000 × 1.60 = 12,800. SP = 12,800 × 0.75 = 9,600. Profit = 9,600 - 8,000 = 1,600. Profit% = (1,600/8,000) × 100 = 20%.
If a number is increased by 25% and then decreased by 20%, what is the net percentage change?
A 5% increase
B 0% change
C 5% decrease
D 10% increase
Correct Answer:
A. 5% increase Explanation:
Let number = 100. After 25% increase = 125. After 20% decrease on 125 = 125 × 0.8 = 100. Net change = 0%. Wait, recalculate: 100 → 125 → 125 × 0.8 = 100. Actually net is 0%, but let me verify: 100 × 1.25 × 0.8 = 100. Net change is 0%. Actually the answer should be B.
