:agree:
Divide the large number by the small number.. or spin the pinion and count how many times it turns a complete round and mark a line on the ring somewhere and make the ring turn once around... If it (the pinion) turns three times around then a lil past a half turn then its 3.55,, If it spins around a tad past 4 turns its a 4.10,, if it turns 3 times and 3/4 turns its a 3.73,, so on so forth...