What are you asking here i think it should be 20:100
12'000×1.5 I think might need to multiple your answer by 4 yet
One tenth is equal to .1 or 1/10
and .04 is nothing but 4/100
So just multiply them together:
1/10 x 4/100 = 4/1000
And since there are 3 0's we need to move the decimal spot 3 places the the left:
.004
So our final answer is
30 - 5*4 +2 = 12
30 - 20 +2 = 12
10+2 = 12
12 = 12