The easiest way (for me) to count it is to find how much 1 percent is. We know that 31 is 100%, so 1% will be 100 / 31, which is (after rounding to the hundredths) 3,23.
At the first attempt he gave 21 correct answers, so he made 21 * 3,23 = 67,83%.
At the second attempt he gave 29 correct anserws, so he made 29 * 3,23 = 93,67%.
The difference between 97,67% and 67,83% is 25,84% - and that's his improvement :)
Desmond's percentage improvement in his results from the first to the second attempt is approximately 38.1%. This is calculated by comparing his scores on both attempts. The first attempt score was about 67.74% and the second was about 93.55%.
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Jawab:Penjelasan dengan langkah-langkah:No. 1:jarak yang harus ditempuh : 1.000 mwaktu : 100 detikkecepatan = jarak : waktu= 1.000 : 100= 10 m/detik.No. 2: soal tidak lengkap