180
600*70% = 420
600-420 = 180
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30% off 600 = 600 - (0.30 x 600) = 420
30 percent 'off' leaves 70 percent 'on'.70 percent of 199.99 = (0.7 x 199.99) = 139.993
15% off 70= 70 - (0.15 x 70) = 59.50
70% off of 25.50 means . . .-- 17.85 (70%) off-- 7.65 (30%) left on
4.20