What will be the result of this formula =if(a1< 100000,a1*5%,a1*7.5%) , if the cell a1 has a value of 90000?

For this IF function, look at cell A1. The logical test asks if the value in A1 is less than 100,000: in this case, the value of 90,000 would be less. If the value in A1 is under 100,000, the value is to be multiplied by 0.05 (5%), and multiplied by 0.075 if it is 100,000 or greater (7.5%). For a value of 90,000 * 0.05, the value that would be displayed in the cell with the IF function would be 4,500.

6/ 11 = 0.545454 so your answer is55%