that is the fraction form of pi. in decimals, it is 3.1415926....it goes on forever...
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22/7 is a very good approximation of pi (it's around 3.14159...). Pi is nowhere near 45, nor is it close to 22/45 .
The number 22/7=3.14159
22/7
divide both by 5 35/5 = 7 110/5 = 22 35/110 = 7/22
22 / 7 x 90 = 282.85714