Here you can find the source of calcPercentage(int priceInCents, BigDecimal vat)
public static int calcPercentage(int priceInCents, BigDecimal vat)
//package com.java2s; /**/* w w w .ja va2 s . co m*/ * This file is part of alf.io. * * alf.io is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * alf.io is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with alf.io. If not, see <http://www.gnu.org/licenses/>. */ import java.math.BigDecimal; import static java.math.RoundingMode.*; public class Main { public static final BigDecimal HUNDRED = new BigDecimal("100.00"); public static int calcPercentage(int priceInCents, BigDecimal vat) { return new BigDecimal(priceInCents) .multiply(vat.divide(HUNDRED, 5, UP)).setScale(0, HALF_UP) .intValueExact(); } }