Award [2] if the candidate has the correct answer and shows working.
Award [1] if the candidate makes a mathematical error (thus the answer is incorrect) OR if the candidate has the correct answer but does not show working.
N.B. accept 1.76666, as long as the candidate carries the number out to at least three decimal places (1.766), 1.77, or 1.8 (Allow rounding).
If the candidate states their answer as 1.76, award [1] because of the rounding error.
Accept, if the candidate shows their working as (14+80+65) / 90.
If the candidate puts a percentage sign after the ratio, the answer is incorrect (the candidate may have calculated the ratio correctly and, thus, would get [1] for correct working, but they would not get [1] for a correct answer).
Award no marks merely for writing the formula.