Question

【十五分之八减去（十二分之七减去五分之二）】×十四分之十五

Answer 1

[8/15-(7/12-2/5)]*15/14

=8/15*15/14-7/12*15/14+2/5*15/14

=8/14-5/8+3/7

=4/7+3/7-5/8

=1-5/8

=3/8