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4/7 of 80% of a number is 640what is itsits 120. ?de) |
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Answer» We know the 80% is X and we know 2/7 of x = 640.640=2/7x640/2=320 so 320 is 1/7if we multiply 320 x 7, it’s a whole fraction now= 2240so 2240 is 80% of a numbernow let’s CONVERT percentages to fractions80% = 4/52240/4= 560if 560 is 1/5 then five times that is 2800We now have the whole numbertime to find 120%100% + 20%100% = 28002800/5=560=20%so 2800+560=3360Thus, the NUMBER is 3360 |
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