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charstar
To do this you multiply 1280 by 0.4 because you want 100-60% (40%) of the number and 40% as a decimal is 0.4.
1280x0.4=512.

Hope this helps :)
ericosouki
Hello,

Shall we begin?

Decrease 1280 by 60%
60% = 60/100 = 0,6

= 1280 - ( 1280*0,6)
= 1280 - 768
= 512 

Answers: 512