First find the percentage of milk bottles that are fresh: 100% - 20% = 80%
Then find the percentage of the eggs that aren't rotten: 100% - 60% = 40%
Then find the fraction of the flour canisters that don't have weevils: 1 - 1/4 = 3/4
Divide the numerator of this fraction by the denominator and multiply by 100% to convert from a fraction to a percent: 3 / 4 * 100% = 75%
Then multiply the probability that each ingredient is good to find the probability they all are: 75% * 80% * 40% = 24%
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