class Solution {
public int[] solution(int numer1, int denom1, int numer2, int denom2) {
int a = (numer1 * denom2) + (numer2 * denom1);
int b = (denom1 * denom2);
int i = 2;
while (true) {
if(Math.min(a,b) < i) break;
if(a%i == 0 && b%i == 0) {
a /= i;
b /= i;
i = 2;
} else i++;
}
return new int[] {a,b};
}
}
더하고 약분했어유~