You're on a roll —
Here's a concise version for the exam:
Step 1: Calculate the simple interest (I).
I=TotalAmount−Principal
I=N15,500−N12,500=N3,000
Step 2: Convert the interest rate (R) to a decimal.
R=10%=0.10
Step 3: Calculate the time (T) using the formula T=P×RI.
T=N12,500×0.10N3,000
T=1,2503,000
T=2.4
The time taken is 2.4 years.
2.4years
Got more? Send 'em.