2,5% ditambah 3 1/2 dikali 3/5

2,5% + 7/2x3/5 = 2,5% + 21/10 = 0,025 +2.1 = 2,125

2,5% + 3 1/2 × 3/5
=25/1000 + 7/2 × 3/5
=25/1000+ 21/10
=25/1000+2100/1000
=2125/1000=2,125