Math, asked by soundharya2006p7d4mc, 1 year ago

Garima’s expenditure in February is 20% less than in January. Her expenditure in February is 25% less than in March. If she spends Rs.560 in March,what is her expenditure in January?

Answers

Answered by RevinR
1
F=expenses in february
J=expenses in january
M=expenses in march=560

F=J-20%J

F=M-25%M
F=560-25%×560
F=560-140
F=420

F=J-20%J
F=420=J-J/5
420=4J/5
4J=420×5=2100
J=2100/4=525

Expenses in january=525

soundharya2006p7d4mc: F=420=J-J/5
420=4J/5
RevinR: yeah
RevinR: what's wrong
soundharya2006p7d4mc: Can u explain this? How did u take here 4j?
RevinR: it was because: J-J/5=(5J-J)/5=4J/5
RevinR: on taking lcm
soundharya2006p7d4mc: Ok thanks!
RevinR: no mention....
soundharya2006p7d4mc: It’s very helpful
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