The number is 125 and the equation is 0.8x = 100 Step-by-step explanation: 80% of x is equal to 100. Write an equation that shows the relationship of 80%, x, and 100 80% = 0.8 0.8x = 100 x = 100/0.8 x = 125 The number is 125 and the equation is 0.8x = 100
