1.25 decades = 12.5 years
12.5 years x 12 months per year = 150 months
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How many months are in 4 decades
120 months in a decade
1 year = 12 months so 5 decades = 5*10 = 50 years = 50*12 = 600 months!
15*10*12 = 1800 months
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