I learned that to make fraction into a percent just multiply with 100.However I tried to do 3/2 to percent it become 150 percent. In my understanding 2/3 is 1.5% please clarify

2 answers

You're right that 3/2 = 150%

However, 2/3 = 2 divided by 3 = 0.6667 = 67%
The reason why you multiply the fraction by 100 is because the fraction less than one whole number. 2/3 means two thirds of a pie or a pizza. It's only partial of one pie.
1/1, 2/2, 5/5 is 100%. 3/2 is more than one whole number because 2/2 is equal to one, so it's going to more than 100%. 2/3 is less then one, so the percentage is going to less than 100%