If A = 145 4 and B = 127 5, then find B - A?

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If A = 145<br><img src='https://www.fatskills.com/images3/class3olympiad/image01127.jpeg' width='200px'> 4 and B = 127<br><img src='https://www.fatskills.com/images3/class3olympiad/image01127.jpeg' width='200px'> 5, then find B - A?