That's a 33% increase.
I calculated this using the formula:

Where n = the new value (16 in your question), o = the old value (12 in your question) and the result is outputted as a percent increase. You can check that this is correct by finding 33% of 12, adding the result to 12, and checking that the result equals your "new" number.
Note that 33% is only an approximation as your question requires a number rounded to the nearest whole.
Answer:oop
Step-by-step explanation:
Answer:
angle 4
Step-by-step explanation:
Angle 4 is the opposite of angle 5, if you flip the paper upside down, you'll see that it is the same
(2+1)+3=2+(2+2)
Any two numbers that add to 4.