1 1/6 hours is equal to 60 minutes add 10 minutes = 70 minutes 7/8 takes 70 minutes To find out what can be done in 10 minutes, divide both numbers by 7 7/8 / 7 = 1/8 1/8 takes 10 minutes To find out how much is painted in 1 minute, divide both by 10 1/8 / 10 = 1/80