( 1) ( )÷( )=2/3
Count by number of copies
Suppose the dividend is 2 and the divisor is 3. Then the divisor is more than the dividend by 1 share (the difference between the divisor and the dividend is 25), and 1 share is 25. Divided by two equals 25×2=50. Divided by three equals 25×3=75.
(2) Take car B as the unit 1.
1- 1/7=6/7 6/7 is 42 of car A divided by 6/7 equals 49 (of car B).
364(42+49)= 4 (hours)