4 1 per 5 × 2,25 ÷ 7 per 10

4 1/5 × 2,25 ÷ 7/10

21/5 × 225/100 ÷ 7/10

21/5 × 225/100 × 10/7

21×225×10/5×100×7

47.250÷10/3.500÷10

4.725÷25/350÷25

189÷7/14÷7

27/2

pecahan campuran = 13 1/2

Desimal = 13,5

persen = 1.350%