The answer is: " - 4/25 " ; or, write as: " - 0.16 " .
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Explanation:
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Method 1):
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8/15 * -3/10 ; the (-3) cancels to "-1" and the "15" cancels to "5" ;
{"Since: (15÷3=5} ; and since: (-3÷3= -1} ;
the "8" cancels to a "4" ; and the "10" cancels to a "2" ;
{"Since: (8÷2=4) ; and since: {10÷2 =5} ;
And we can rewrite the problem as:
4/5 * -1/5 ;
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→ 4/5 * -1/5 = (4*-1) / (5*5) ;
= - 4/25 ;
{or, write as: "-0.16 " }.
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Method 2)
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8/15 * -3/10 = (8*-3) / (15*10) '
= -24/150 = ? ;
Divide each side of this "fraction" by: "6" ;
(-24÷6) / (150÷6) = " - 4/25 "; or, write as: " - 0.16" .
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