Simple calculation: 3 / 7 times 5 / 4 plus 4 / 7 times 5 / 4

Simple calculation: 3 / 7 times 5 / 4 plus 4 / 7 times 5 / 4

3/7×5/4+4/7×5/4
=5/4×(3/7+4/7)
=5/4×1
=5/4