25%
100:100•25=25
1000:100•25=250
60:100•25=15
120:100•25=30
20%
100:100•20=20
400:100•20=80
50:100•20=10
200:100•20=40
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25%
100:100•25=25
1000:100•25=250
60:100•25=15
120:100•25=30
20%
100:100•20=20
400:100•20=80
50:100•20=10
200:100•20=40