Percent equation/proportion

divide the percent by 100

move the decimal twice to the left

multiply the decimal by 100

move the decimal twice to the right

divide the decimal by 100

move the decimal twice to the left

multiply the decimal by 100

move the decimal twice to the right

add

subtract

multiply

divide

add

subtract

multiply

divide

multiply; actual; add or subtract

multiply; estimated; divide or add

divide; actual; multiply or subtract

divide; estimated; add or subtract

$$\frac{part}{whole}=\frac{\%}{100}$$  

$$\frac{part}{100}=\frac{\%}{whole}$$  

$$\frac{part}{\%}=\frac{100}{whole}$$  

$$\frac{\%}{part}=\frac{whole}{100}$$  

$$\frac{\%}{100}=\frac{whole}{part}$$