The factor pairs of 1600 are (1600,1)(800,2)(400,4)(320,5)(200,8)(160,10)(100,16)(80,20)(64,25)(50,32)(40,40)
None of them add up to 60. If that was -1600, you could use 80 and -20.
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266.67 160 : 60% = n : 100% 60%n/60% = (160 * 100%)/60% n = 1600/6 n = 266.67
( 5 ) ( x ) = 60x = ( 60 ) / ( 5 ) = 12
negative 60
It equals 0.3 times 60 = 18 minutes