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Change percentage to decimal
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75% = 0.75
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Find percentage
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75% of 300 = 0.75 x 300
75% of 300 = 225
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Answer: 225
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P = 2(L + W)
P = 150
L = 5W + 7
150 = 2(5W + 7 + W)
150 = 2(6W + 7)
150 = 12W + 14
150 - 14 = 12W
136 = 12W
136/12 = W
11.33 (or 11 1/3) = W <=== width
L = 5W + 7
L = 5(34/3) + 7
L = 170/3 + 7
L = 170/3 + 21/3
L = 191/3 (or 63 2/3) = L <=== length
128 mm is the corrrect but not corre I by score u should.
Carets normally are used for an exponent so for example
2^3=8
Hope it helps feel free to ask question