This can be done algebraically:
300*x=330 Where x is the multiplier
Therefore x=330/300=1.1
To find a percentage of a number you multiply by the percentage divided by 100.
So 330 is 110% of 300, which is an increase of 10%.
The answer is D:10 cm, I just took it and got this.
The answer to your problem would be 0.05
2x+15x you can just switch the two.
