45 is what percent of 50

90 percent or 90%

Step-by-step explanation:

To start, let's find what fraction it is of 50, then multiply that by 100 since 1% = 1/100. Basically, we want to find 45/50. Instead of simplifying, let's just multiply by 100 without simplifying to get 45*100/50, which is 45 * 2 = 90.