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150-100%
15•100%\150•x
x=10%
B
20%-x
100%-36
20•36=100•x
x=20•36/100
x=36/5=7 1/5
C
60-100%
x-25%
60•25=100x
x=60•25/100=15
60+15=75
E
200-100%
160-x
200x=100•160
x=100•160/200
x=80%
F
100-x
20•x=100•40
x=100•40/20
x=100•2
x=200
10%=20
20+40=60