Question

Natalie picked 135 berries in 15 minutes if she continues picking at that rate how long will it take her to pick 486 berries. With explanation

Answer 1

it will that her 54 mins to pick 486
because 135*3=405
3*15=45
486-405=81 
81/135=0.6
0.6*15=9
9+45=54

Answer 2

It would take 54 minutes to pick 486 berries. 

135/15 = 9

then
 
486/9 = 54