1000*400=400000
400 + 1000 = 1400
400 percent of 1000 = 4000
0.4
400
1000 + 400 - 300 = 1100
400 + 900 + 1000 = 2300
1000 g = 1 kg so 400 g = 400/1000 = 0.4 kg. Simple!
2/5 x 1000 = 400
There are 1000 micrograms in a milligram. To convert this, you need to divide by 1000. 400/1000 is 0.4 milligrams.
600 + 400 = 1000
400% of 250 = 250 * 400/100 = 1000 400 is 160% of 250 -- 400/250 * 100 = 160%