It is 70% Because:
250/100 + 175/x
Proportions
If the number you are rounding is followed by 5, 6, 7, 8, or 9, round the number up (+1).
If the number you are rounding is followed by 0, 1, 2, 3, or 4, round the number down (no change).
The number in the photo should be the answer but the problem might just be that your question was worded incorrectly.