Решите плез. Знайти видсотки, для 6 класса

Решите задачу:

$5 \frac{8}{11}*(6 \frac{28}{63}-5 \frac{36}{63})= \frac{63}{11}*( \frac{58}{9}- \frac{39}{7})= \frac{63}{11}*( \frac{406-351}{63})= \frac{63}{11}* \frac{55}{63}=5 \\ \\ (20,175+8 \frac{5}{8}):1 \frac{4}{5} =(20 \frac{175}{1000}+8 \frac{5}{8}): \frac{9}{5}= ( \frac{20175}{1000}+ \frac{69}{8})* \frac{5}{9}= \\ \\ = \frac{20175}{1000}* \frac{5}{9} + \frac{69}{8}* \frac{5}{9}= \frac{6725}{3*200}+ \frac{23*5}{3*8}= \frac{269}{3*8}+ \frac{115}{3*8}= \frac{384}{24}=16$