Simplification ratio: 4 / 5 kg: 30 g, 5 cm: 0.1 M, 1 / 3 h: 0.3 M2: 750 M2

4 / 5 kg: 30g = 0.8kg: 30g = 800:30 = 80:3
5cm: 0.1M = 5:10 = 1:2
1 / 3 hour: 15 minutes = 20:15 = 4:3
0.3 square meter: 750 square decimeter = 300:750 = 6:15 = 2:5

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