How do you solve percentage math sums?

to find,ten,pecent,you,divide,all,sums,by,ten to,find,twenty,percent,you,divide,by,ten,and,multipy,your,answer,by,2 to,find,thirty,percent,you,divide,by,ten,and,multiply,by,3 to,find,forty,percent,you,divide,by,ten,and,times,by,4 to,find,fifty,percent,you,half,your,number to,find,sixty,percent,divide,by,ten,and,multiply,by,6 to,find,seventy,percent,divide,by,ten,and,multiply,by,7 to,find,eity,percent,divide,by,ten,and,multiply,by,8 to,find,ninty,percent,divide,by,ten,and,multiply,by,nine i,jus,no,te,basic,pecents opefully,dis,wos,useful,to,u to find,ten,pecent,you,divide,all,sums,by,ten to,find,twenty,percent,you,divide,by,ten,and,multipy,your,answer,by,2 to,find,thirty,percent,you,divide,by,ten,and,multiply,by,3 to,find,forty,percent,you,divide,by,ten,and,times,by,4 to,find,fifty,percent,you,half,your,number to,find,sixty,percent,divide,by,ten,and,multiply,by,6 to,find,seventy,percent,divide,by,ten,and,multiply,by,7 to,find,eity,percent,divide,by,ten,and,multiply,by,8 to,find,ninty,percent,divide,by,ten,and,multiply,by,nine i,jus,no,te,basic,pecents opefully,dis,wos,useful,to,u to find,ten,pecent,you,divide,all,sums,by,ten to,find,twenty,percent,you,divide,by,ten,and,multipy,your,answer,by,2 to,find,thirty,percent,you,divide,by,ten,and,multiply,by,3 to,find,forty,percent,you,divide,by,ten,and,times,by,4 to,find,fifty,percent,you,half,your,number to,find,sixty,percent,divide,by,ten,and,multiply,by,6 to,find,seventy,percent,divide,by,ten,and,multiply,by,7 to,find,eity,percent,divide,by,ten,and,multiply,by,8 to,find,ninty,percent,divide,by,ten,and,multiply,by,nine i,jus,no,te,basic,pecents opefully,dis,wos,useful,to,u