27.3 is the answer. But you can round it off to 27.
The 30% taken off is $30. The 70% left on is $70.
30 % off of 525 is (100 - 30 = 70) % of 525 remaining: 70 % of 525 = 70/100 x 525 = 367.5
30% off of 195.00 = 70% of 195.00 = 195.00*70/100 = 136.50
30% off of 154.00 = 70% of 154 = 154*70/100 = 107.80
70% off = 30% left of 20,000 which is 20,000*30/100 = 6,000
30% off of 47 = 70% [100%-30%] left of 47 = 47*70/100 = 32.9
70% off of 25.50 means . . .-- 17.85 (70%) off-- 7.65 (30%) left on
30% off of 8.50 = 70% [left] of 8.50 = 8.50*70/100 = 5.95
30% off 99 = 70% left of 99 = 99*70/100 = 69.3
30% off of 42 = 70% of 42 = 42*70/100 = 29.40
30% off of 14.99 = 70% [remaining] of 14.99 = 14.99*70/100 = 10.493
30% off of 54 = 70% of 54 = 54*70/100 = 37.8