Solutions by everydaycalculation.com
645 ÷ 660 is 43.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/45÷6/60 6/45÷12/60 6/90÷6/60 18/45÷6/60 6/45÷18/60 30/45÷6/60 6/45÷30/60 42/45÷6/60 6/45÷42/60
© everydaycalculation.com