Here you can find the source of formatPercentage(Number numerator, Number denominator)
public static String formatPercentage(Number numerator, Number denominator)
//package com.java2s; /*/*from ww w. ja v a 2s .c o m*/ * Copyright 2016-2017 the original author or authors. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * */ public class Main { public static String formatPercentage(Number numerator, Number denominator) { return String.format("%.2f%%", 100.0 * numerator.doubleValue() / denominator.doubleValue()); } }