Question

Lilla read 1/5 of her book last week. This week she read 3 times as much as she read last week.

Answer 1

She read 3/5 of the book this week

Answer 2

last week she read=1/5
this week she read=3*1/5=3/5
she has read =last week+ this week
=1/5 +3/5
=4/5
left to read=5/5-4/5
=1/5