student asking question

Does "by" usually come after "increase" or "decrease" to indicate how much it's increased or decreased?

teacher

Native speaker’s answer

Rebecca

Yes, that's right! If you want to indicate the degree to which something increased or decreased, the preposition "by" can be used before the measurement or amount. Ex: I've been increasing my running time by five minutes every day. Ex: Their stocks decreased by five percent after this weekend.

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