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1. Mary answered 25% of her assignment in the school. How many more items will she have
to answer at home if her assignment is 40 items?
2. Jose drank 30% of a bottle of orange juice in the morning. If it contains 350ml, how much
orange juice was left?
2.
1. Mary answered 25% of her assignment in the school. How many more items will she have
to answer at home if her assignment is 40 items?
2. Jose drank 30% of a bottle of orange juice in the morning. If it contains 350ml, how much
orange juice was left?
2.
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Answer:
1. 30 more Items
2. 245ml was left
Step-by-step explanation:
1. If Mary needs to answer 40 items, and she already answered 25% of those 40 items, then she already answered 10 items since 10 is 25% of 40. 40 - 10 = 30,
giving us our answer, she has to answer 30 more Items. To prove my answer, in a 100% quantity, there are four 25 percents (%), so 10 ( 25%) × 4 is equal to 100% of 40, which is 40, proving that our answer is correct.
2. If Jose drank 30% of orange juice from a 350ml bottle, that means he drank 105ml of orange juice because 30% of 350ml is 105ml, and when we subtract the amount of juice he had taken from the total amount of juice (350ml - 105ml), we will be left with 245ml, the amount of juice left in the bottle after he drank 30% of the orange juice. To prove my Answer There are three 30 percents (%) in a 100% quantity, so 105ml (30%) × 3 = 315ml (90%), but there's 10% left to finish the 100% quantity, 10% which is 1/3 of 30%. So, to get this 10% amount, we first need to get
the quantity of 1/3 of 30% (105ml), 105.00ml × 0.10 = 35.00ml, thus, 35.00ml is the left 10% from the 100% quantity, so, 105ml (30%) × 3 = 315ml (90%) + 35ml (10%) = 350ml (100%), proving that our answer is correct. I hope I helped.