30%=.3
.3*$70=$21
30% of $70 is $21. 70 - 21 = 49
$7,000
seventy five dollars
21.90
30/100 = x/78 cross multiply 78 * 30 = 100 * x (78 * 30)/100 23.4
Sixty eight dollars
Seven dollars and twenty cents, or $7.20
Seven percent.
30% of 70 = 70*30/100 = 21
$296
$19,500
$17.50