100 per cent of the participants scored more than 30 per cent in the post test, which was 70 per cent more than the pre test score.
I can't tell what "which" refers to, the number of participants or the score. Even though it says "score" I don't believe it because grammatically it's the number of participants. "Percent" is written as one word nowadays.
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I can't tell what "which" refers to, the number of participants or the score. Even though it says "score" I don't believe it because grammatically it's the number of participants. "Percent" is written as one word nowadays. You cannot begin a sentence with a numeral, so it is lucky that you shouldn't use percent there anyway. "Post-test" strikes me as a nonce word that is better hyphenated. Per