"20% off" means "80% still there".
0.8 x 7 = 5.60
7 - (7 times 0.2)
5.60
5.6 pounds
5.6 pounds
7 of out 20 in percent is (7/20)*100 = 35 percent.
20 percent off of 750 is 600.
20 percent off 249 = 199.20
20 percent off of 30 is 6.
20 percent off of 28.95 is 5.79.
79.6 is 20 percent off of 398.
64 is 20 percent off of 320.
20 percent off of 390 is 78.