YSK that your credit card statements include a monthly payment amount that tells you how much to pay to have the card fully paid off in three years, which will save a lot of money versus paying only the minimum.
from /r/YouShouldKnow
YSKでは、クレジットカードの明細書に毎月の支払額が記載されており、3年後にカードを完済するにはいくら支払えばよいかがわかるようになっています。