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Anonymous
$63 dollars. 10 percent of 70 is 7. 70-7 is 63.
Wiki User
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70 cents or 6.30 remains 7.00*.1=0.70. 7.00-.70=6.30
30-21=9 dollars
"30 percent off" means "70 percent on" .70% = 0.70.7 x $130 = $91
140.00
$70