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7 years to decade(show solution)

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Roietemillenaviz
0.7 decade since 10 years is equal to 1 decade

10 - 3 = 7
1 - 3 = 0.7
1 decade is 10 years.

7 years to 10 years = 7:10 (ratio) or 7/10 or 0.7