00:01
This time we want 20 % reduction, which is pretty much 80 % of the old volume.
00:06
So we know the new length is 12, subtract x.
00:14
Because x, we don't know the amount of reduction, so we're going to subtract it by x.
00:19
The width, the new width, is going to be originally 7 and you subtract x, and the height is still 3, which is the thickness.
00:28
Now, remember, we want 80%.
00:30
So we're going to do lane tons widths height.
00:34
12 minus x, 7 minus x times 3.
00:39
Because 20 % reduction is really 80 % of the old volume...