Two fifths of an hour = () minutes 15 grams = () grams three fifths of a meter = () centimeters

Two fifths of an hour = () minutes 15 grams = () grams three fifths of a meter = () centimeters

Two fifths of an hour = (24) minutes, 15 grams = (15) grams, three quarters of a meter = (12) centimeters
（2/5）×60=24
15=15
3/25×100=12
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Two fifths of the fruits were sold and 120 kg were bought. Now the fruits are 4 fifths less than before. How many kilogram of the original fruits?

Solution (1) if you have learned the linear equation of one variable:
Set the original fruit x kg
（1-2/5）x+120=(1-4/15)x
0.6x+120=11x/15
2x/15=120
x=900
A: the original fruit is 900 kg
Solution (2) if you have not learned the linear equation of one variable:
120÷（2/5-4/15）
=120÷2/15
=900 (kg)
2 / 5 is sold, 4 / 15 is less after 120 kg, it is unit 1. So 120 accounts for 2 / 15 of the original
A: the original fruit is 900 kg

(1) The percentage of 50 is 35. (2), the percentage of a half meter is four fifths. (3) the percentage of a half meter is four fifths

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