You can put this solution on YOUR website! My answer is:
a)(to the fist one:Express 37.5% as a common fraction)is or it might be 2.80/10}} =>that is when we do this>37,5/1,875!
b)(7 2/5% of x is equal to 74-i am not sure if it is 72/5 or something else so i can not help you :(!