noun
increment; addition; amount of increase
Refers to the portion or amount by which something increases, often used in financial, statistical, or quantitative contexts.
今年の売上増加分は前年比で5%だった。
The increase in sales this year was 5% compared to last year.
予算の増加分は新しいプロジェクトに充てられる。
The budget increment will be allocated to the new project.
増分 is a more technical term for 'increment', often used in mathematics or programming, whereas 増加分 is more common in everyday business or economic contexts.
Compound of 増加 (increase) and 分 (portion, amount).