To increase an amount by 37 percent multiply by?

To increase an amount by 37 percent, you would multiply the original amount by 1.37. This is because 1 represents 100%, and adding 37% would be equivalent to multiplying by 1 + 0.37 = 1.37. For example, if you have $100 and want to increase it by 37%, you would multiply $100 by 1.37 to get the new amount after the increase.