The equation I'm going to use is the equation you would use with the original number to find 150% pecent of it. 1.5x=12 Now, let's divide both sides by 1.5. 12÷1.5=8 Let's check our answer. We can split 150% in 2 segments, the 100% and the 50%. 8+4=12 Adding 100% of 8 and 50% of 8. 12 is 150% of 8.