1. **Stating the problem:** Convert given numbers or decimals into percentages. 2. **Formula and rule:** To convert a decimal or fraction to a percentage, multiply by 100 and add the percentage symbol (%). 3. **Example:** If you have a decimal like 0.75, the percentage is calculated as: $$0.75 \times 100 = 75\%$$ 4. **Explanation:** Multiplying by 100 shifts the decimal point two places to the right, converting the decimal to a percentage. 5. **Additional examples:** - Convert 0.2 to percentage: $$0.2 \times 100 = 20\%$$ - Convert 1.5 to percentage: $$1.5 \times 100 = 150\%$$ 6. **Summary:** To convert any number to a percentage, multiply by 100 and add %.