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01-09-2015
Mathematics

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convert 8 21/40 to a decimal

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01-09-2015

= 8 21/40

= 8 + 21/40

= 8/1 + 21/40

= (8/1 * 40/40) + 21/40

= 320/40 + 21/40

= 341/40

= 341 ÷ 40

= 8.525

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