What is the real interest rate on a Credit Card loan bearing 24% inter

What is the real interest rate on a Credit Card loan bearing 24% interest per year, if the rate of inflation is 10% ?

240%
34%
14%
4%
This question was previously asked in
UPSC CAPF – 2019
The real interest rate is the nominal interest rate adjusted for the effects of inflation. The approximate relationship is given by the Fisher equation:
Real Interest Rate ≈ Nominal Interest Rate – Inflation Rate
Given:
Nominal Interest Rate = 24%
Inflation Rate = 10%
Real Interest Rate ≈ 24% – 10% = 14%
– The nominal interest rate is the stated interest rate without accounting for inflation.
– Inflation erodes the purchasing power of money over time.
– The real interest rate reflects the actual increase in purchasing power received by the lender (or paid by the borrower) after accounting for inflation.
The exact formula for the real interest rate is (1 + nominal rate) = (1 + real rate) * (1 + inflation rate).
1 + Real Rate = (1 + Nominal Rate) / (1 + Inflation Rate)
1 + Real Rate = (1 + 0.24) / (1 + 0.10)
1 + Real Rate = 1.24 / 1.10
1 + Real Rate ≈ 1.12727
Real Rate ≈ 1.12727 – 1 = 0.12727 or 12.73%.
However, the approximate formula is commonly used, especially in multiple-choice questions where the options are spaced out, and it matches one of the options (14%) closely enough considering the approximation inherent in the question’s context.