21.3333
30.4762
30% of 640 = 30% * 640 = 0.3 * 640 = 192
21.3333
Reducing something by 30% involves working out what 30% of it is, then subtracting that amount.30% of 640 means 30 hundredths of 640.One hundredth of 640 is 6.4, so 30 hundredths is 30 x 6.4 = 19230% of 640 = 192, so 30% off 640 = 640 - 192 = 448
I will not answer since this is a question a teacher will ask you
0.0125
213.3333
23.7037
12.7156
30% off of 640 = 640 - (0.30 x 640) = 448
106.6667