800 / 4 = 200
minus 800 g or -800g
200
800
225 - 200 = 25
7 billlion minus 200 million is 6 billion 800 million (6,800,000,000).
4 times 200=800.
912 minus 712 equals 200
200 - 100 = 100
How about: 800+200 = 1000 or 2*500 = 1000
225
200% of 800 = 800*200/100 = 1600