Процент - это сотая часть числа
37/50 = (37·2)/(50·2) = 74/100 = 0,74 = 74%
19/25 = (19·4)/(25·4) = 76/100 = 0,76 = 76%
3/5 = (3·20)/(5·20) = 60/100 = 6/10 = 0,6 = 60%
17/20 = (17·5)/(20·5) = 85/100 = 0,85 = 85%
9/10 = (9·10)/(10·10) = 90/100 = 0,9 = 90%
23/25 = (23·4)/(25·4) = 92/100 = 0,92 = 92%
4/5 = (4·20)/(5·20) = 80/100 = 8/10 = 0,8 = 80%
13/20 = (13·5)/(20·5) = 65/100 = 0,65 = 65%
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Можно и так:
37/50 = 37 : 50 · 100 = 74%
19/25 = 19 : 25 · 100 = 76%
3/5 = 3 : 5 · 100 = 60%
17/20 = 17 : 20 · 100 = 85%
9/10 = 9 : 10 · 100 = 90%
23/25 = 23 : 25 · 100 = 92%
4/5 = 4 : 5 · 100 = 80%
13/20 = 13 : 20 · 100 = 65%
б) сокращаем дробь на 5 получаем 8/15
в) сокращаем дробь на 12 получаем 1/4
г) сокращаем дробь на 8 получаем 2/3
8/12=2/3
12/16=3/4
12/18=2/3
24/40=3/5
18/27=2/3
8/36=2/9