package cn.iocoder.yudao.module.erp.service.statistics;
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import java.math.BigDecimal;
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import java.math.RoundingMode;
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final class PurchasePriceMetrics {
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private PurchasePriceMetrics() {}
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static BigDecimal changeRate(BigDecimal latest, BigDecimal previous) {
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if (latest == null || previous == null || previous.signum() == 0) return null;
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return latest.subtract(previous).multiply(BigDecimal.valueOf(100))
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.divide(previous, 2, RoundingMode.HALF_UP);
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}
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}
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