If inflation goes up by $7$ percentage points, the target $($nominal$)$ federal funds rate goes up by

percentage points $($ percentage points due to the direct impact of inflation and another

percentage points due to an increase in the inflation gap$).$

Consider the Fisher equation. Given the increase in the nominal interest rate you just calculated and the $7$

percentage point increase in inflation we started with, the real interest rate must have increased by

percentage points.