Answer:
B
Step-by-step explanation:
First, we are decreasing the number so it has to be a decrease.
Next, we divide 7/31 and get around 0.23, which also represents 23 percent.
This only shows that 7 is 23 percent of 31, so we need to find the decrease by seeing the difference of 100 and 23.
We get 100 - 23 = 77, and because it is a decrease we get B.
4.) 3/100 = 0.03
5.) 73% = 0.73
6.) 0.1 = 10%
7.) 254% = 2.54
I hope this is what you're looking for!