Assume a company's sales are $$1\mathrm{.}3$ million in $2023,$ $$1\mathrm{.}5$ million in $2024,$ and $$1\mathrm{.}4$ million in $2025.$

Required:

a$.$ What is the percentage change from $2023$ to $2024?($Be sure to indicate whether the percentage change is an increase or a decrease.$)$

b$.$ What is the percentage change from $2024$ to $2025?($Be sure to indicate whether the percentage change is an increase or a decrease.$)$