#### Answer

50%

#### Work Step by Step

Percent increase formula: $\frac{Difference}{Formula}$$\times$100
Plug in values: $\frac{57-38}{38}$$\times$100=$\frac{19}{38}$$\times$100=$\frac{1}{2}$$\times$100=50%

Published by
Prentice Hall

ISBN 10:
0133500403

ISBN 13:
978-0-13350-040-0

50%

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