So these are mixed fractions and we can solve them after turning into improper fractions!
8 1/10 - 4 2/3
now multiply the denominator with the whole number then add the product to the numerator!do it to both the fractions!
= 8x10+1/10 - 4x3+2/3
= 81/10 - 14/3
now you just simply have to solve these!if u can't , tell me i'll do it for you!