store sold 15% on the first day and on the second day 40% and after that store has 142.8kg of supplies left. how much supplies did the store had on the first day?\
+37084 I will assume you meant the store sold 40% of the original total on day 2 (not 40% of what was left after selling 15% on day one)
40 + 15% = 55% sold 45% remains = 142.8 kg
45/100 (x) = 142.8
x= original amount = 142.8/.45 = 317.333 kg
