上昇 (rise, ascent) + 率 (rate, ratio). Standard vocabulary in economic news, where it is usually compared with the same month or year before.
Common collocations
- 物価の上昇率: the rate of price increases
- 上昇率が高い: to have a high rate of increase
- 前年比の上昇率: the year-on-year rate of increase
Similar words
- 下落率: rate of decline — the opposite, used of prices and markets
- 伸び率: growth rate — everyday and positive in tone, used of sales and numbers of users