A girl has a massvof 35 kg. Her mass is 2.5 kg more than her younger sister. By what percentage is her mass greater than her sister's?
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Answer:
girl's mass= 35
more than sis's= 2.5
dfrnc = 35-2.5= 32.5
%= 2.5\32.5 multiply by 100= 7.6%
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