Вычислить 40/143-41/156=

10/143  -  41/156 =  (10 * 12  -  41 * 11)/1716 = 12/17160  -  451/1716 =  - 331/1716

[latex] \frac{40}{143}- \frac{41}{156}= \frac{12*40}{1716}- \frac{11*41}{1716}= \frac{480}{1716}- \frac{451}{1716}= \frac{29}{1716} [/latex]