Question

stella writes 1/7 of a page in 1/5 of a minute. how many minutes doesn’t it take her to write a full page?

Answer 1

First figure how much time 1/5 of a minute is by dividing 60 seconds by 5 - the answer is 12 seconds. If Stella writes only a seventh of her paper in 12 seconds, then a whole paper would be seven times that - which equals 84 seconds.