You subtract the % that the sale is and take it away from 100%. You get 75% then take the original price and divide it by .75
Sorry I can’t help you because I can’t measure it
5/8 that's how ratio of students that will buy lunch. so in order to find number students who will buy the lunch out of 720, just multiply 720 with 5/8 ie, 720x5/8 ie 450.
450 is answer
