Simple past tense and past participle of decrease.(verb)
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Use "decreased" in a sentence
"Of course completion of a project will result in decreased or eliminated funding for a second, identical or similar project."
"Genistein decreased mammary tumor growth by 33 percent while daidzein increased it by 38 percent when compared with placebo."
"The reason our total Co2 output has not decreased is that while CO2 per unit of GDP (I will call this CO2 efficiency) has improved 2-4 percent per year, our GDP has grown the same rate or faster."