Help me

first find the common denomenator of 8,

then, multiply the 3/4 by 2/2 to get 6/8

after that, multiply the 1/2 by 4/4 to get 4/8

finally do the subtraction of 6/8 - 4/8

the final answer is 2/8 or 1/4

When adding or subtracting fractions, the denominator must be the same

3/4 - 1/2  =  3/4 -  2/2(1/2) = 3/4 -2/4 = 1/4