Bonjour
Pyramide multiplicative :
………….. | A |
………..| B | C |
…| 7/12 | D …..| E |
| F ..| 7/8 | 15/7 | 4/5 |
E = 15/7 x 4/5
E = 15/5 x 4/7
E = 3 x 4/7
E = 12/7
7/12 = F x 7/8
F = 7/12 x 8/7
F = 8/12 x 7/7
F = 2/3
D = 7/8 x 15/7
D = 15/8 x 7/7
D = 15/8
B = 7/12 x 15/8
B = 15/12 x 7/8
B = 5/4 x 7/8
B = 35/32
C = 15/8 x 12/7
C = 12/8 x 15/7
C = 3/2 x 15/7
C = 45/14
A = 35/32 x 45/14
A = 1575/448
……. | 1575/448 |
…..| 35/32 | 45/14 |
…| 7/12 | 15/8 | 12/7 |
| 2/3 | 7/8 | 15/7 | 4/5 |
