Which ratio is equal to 27 : 81? 1 : 9 2 : 9 3 : 9 3 : 27 9 : 12 correct awnser

The first week samantha learned to read braille, she could read 10 words per minute. in the second week she increased her speed by 20%. in the third week she increased her speed again by another 25%. how many words could she read per minute by the third week? hurry and tell me!