1. The problem is to decrease 180 by 30 percent. 2. To decrease a number by a percentage, use the formula: $$\text{New value} = \text{Original value} - \left(\frac{\text{Percentage}}{100} \times \text{Original value}\right)$$ 3. Substitute the values: $$\text{New value} = 180 - \left(\frac{30}{100} \times 180\right)$$ 4. Calculate the decrease amount: $$\frac{30}{100} \times 180 = 0.3 \times 180 = 54$$ 5. Subtract the decrease from the original value: $$180 - 54 = 126$$ 6. Therefore, decreasing 180 by 30 percent gives the result 126.