There are 22 blue balls in a basket and the ratio blue balls:black balls is 7:4 . 4 more black balls are added. Find the percentage of blue balls in the group. Find the percentage increase in black balls.
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Answer: 53.84%
Step-by-step explanation:
number of blue and black balls = 22
blue balls: black balls = 7:4:4
number of blue balls = 7/11 x 22 = 14
22-14=8
8+4=12
number of blue balls = 14
number of black balls = 12
add 22+4
% of blue balls=14/26 x 100
700/13=53.84%
the percentage of blue balls = 53.84%
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