Answer:
B
Step-by-step explanation:
1 is 100% so increasing it by 12% means adding 0.12 to it
Answer:41550
Step-by-step explanation:
30000×.07=2100
2100×5.5=11550
11550+30000=41550
X=7 (let me know if you would like to know how I got the answer)
1 and 1/5
If we are subtracting
Answer: 
<u>Step-by-step explanation:</u>

