Assume a company's sales are $1.4 million in 2020, $1.6 million in 2021, and $1.5 million in 2022. a. What is the percentage change from 2020 to 2021? Be sure to indicate whether the percentage change is an increase or a decrease. (Negative answer should be indicated by a minus sign. Round your percentage to 1 decimal place.)

b. What is the percentage change from 2021 to 2022? Be sure to indicate whether the percentage change is an increase or a decrease. (Negative answer should be indicated by a minus sign. Round your percentage to 1 decimal place.)