Question

before you are able to take a bite of your new chocolate bar, a friend comes along and takes 1/4 of the bar. If the original length of your bar was x write a simplified expression in terms of x for the length of the remaining part of your bar

Answer 1

The bar was x units long.

Your friend took 1/4x

Subtract what your friend took from the original length:

X - 1/4x = 3/4x remaining.