1.the new number , 200 , is 400 less than the original number . what is the precent change ?
a: 0.6%
b: 1.5%
c: 66%
d: 150%
2.the attendance at a seminar in year 1 was 500 . in year 2 , the attendance changes by 100 . what was the precent change in attendance?
a: 0.2%
b: 0.4%
c: 20%
d: 40%

Arianna is buying plants for her garden. she buys 15 flowering plants for $96. pink flowering plants sell for $8, and purple flowering plants sell for $5. how many pink flowering plants did arianna buy? i figured out the answer! the answer is 7. 8x +5y = 96 plug in 7 for x 8 (7) + 5y = 96 56 + 5y = 96 subtract 56 from both sides 5y/y = 40/5 y = 8 she bought 7 pink and 8 purple plants