Sarah bought a lawnmower for $320. She signed up for the buy now pay later plan at the store with the following conditions: $100 down and payments of $25 for the next 12 months. The extra cost paid by taking this plan is equivalent to what actual yearly rate of interest?
ok so find how much she paid
100 down+25 times 12 months
100+25 times 12
100+300
400
find difference
400-320=80
find percent increase since it is 1 year
80/320=8/32=4/16=2/8=1/4=0.25/1
percent means partst out fo 100
0.25/1 times 100/100=25/100=25%
answer is 25%