Ответ:
Пошаговое объяснение:
№ 3
2% = 2/100 = 1/50
5% = 5/100 = 1/20
79% = 79/100
5,7% = 57/1000
0,4% = 4/1000
3/7% = 3/700
4 1/5% = 4,2% = 21/500
50% = 50/100 = 1/2
20% = 20/100 = 1/5
500% = 500/100 = 5
№ 4
100 * 8% = 100 * 8/100 = 8
100 * 15% = 100 * 15/100 = 15
25 * 5% = 25 * 5/100 = 5/4 = 1 1/4 = 1,25
25 * 20% = 25 * 20/100 = 20/4 = 5
5,6 * 50% = 56/10 * 50/100 = 5,6 * 0,5 = 2,8
8 4/5 * 15% = 44/5 * 15/100 = 8,8 * 0,15 = 1,32