Answer:
37.5%
Step-by-step explanation:
Ok I always do these problems in a weird way cuz im autistic but here's my process...
10% of 40 is 4
5% of 40 is 2
2.5% of 40 is 1
4 goes in to 25 6 times
4x6=24
which is one less than 25
so there's six 10%s which is 60%
plus the extra 2.5%
so it's 62.5%
so the item is 37.5% off...
