By how much is 30% of 80 greater than 20% of 45?
2026
By how much is 30% of 80 greater than 20% of 45?
Answer: A. 15 — CONCEPTTo find p% of a number N, multiply N by p/100. To find how much one quantity is greater than another, subtract the smaller quantity from the larger…
- A.
15
- B.
17
- C.
10
- D.
12
Attempted by 132 students.
Show answer & explanation
Correct answer: A
CONCEPT
To find p% of a number N, multiply N by p/100.
To find how much one quantity is greater than another, subtract the smaller quantity from the larger quantity.
APPLICATION
Compute 30% of 80: (30/100) × 80 = 24.
Compute 20% of 45: (20/100) × 45 = 9.
Subtract the smaller amount from the larger amount: 24 − 9 = 15.
CROSS-CHECK
Adding the difference back to the smaller amount gives 9 + 15 = 24, the larger amount.
RESULT
Therefore, 30% of 80 is greater than 20% of 45 by 15.
Loading lesson…