Сократить дроби 468/540 , 375+775/25 и 21•88•65/143•35•24

Question

Сократить дроби 468/540 , 375+775/25 и 21•88•65/143•35•24

Answer 1

468/540=13/15
375+775/25=375/1+7785/25=9375/25+7785/25=17160/25=686 10/25=686 2/3
21*88*65/143*35*24=705600
1)21*88=1848
2)1848*65/143=1848/1*65/143=120120/143=840
3)840*35=29400
4)29400*24=705600