Answer:
0.487
4.267-3.78 = 0.487
7 comes down since it doesnt have a numeral to be subtracted from (3rd decimal place)
6-7 cant occur so we take one from the 2 next to it so it becomes 16 while the 2 becomes 1
16-8 = 8
now we do it again since 1-3 cant occur , 4 becomes 3, 1 becomes 11
11-7 is 4
3-3 = 0
so now we add the decimal point, 3 places
0.487