Ответ:
1 – In the treatise of 1494, the Sum of arithmetic Russ. the Italian mathematician Luca Pacioli introduces the characters P with a dash — p for più, meaning " plus "and M with a dash — m for meno, meaning"minus".
2 the first who invented the score from 0-9 they were invented by the Indians
3 The word "percent" comes from the Latin "pro centum", which means "for a hundred" or "with a hundred". Percentages are very convenient to use in practice,since they Express parts of integers in the same hundredths. This makes it possible to simplify calculations and compare parts between themselves and the whole.
4 corresponds to an integer percentage of 100%
5 this is a whole cake that is 100%
6 there is no way to do multiplying the fraction to get the final percentage
Объяснение:
вот не уверена что будет правильно учитель сказал правильно